Qhov yooj yim kos duab zaj lus qhia (28 tshooj)
Yooj yim heev kos duab kos cov lus qhia hauv cwj mem. Daim duab kos yooj yim rau cov menyuam yaus thiab cov neeg laus. Cov lus qhia ntxim hlub thiab yooj yim los ntawm kauj ruam kos duab yuav ua li cas kos miv, dev, dais, hma, noog thiab ntau ntxiv, xaiv rau txhua tus saj, thiab qhov tseem ceeb tshaj, yooj yim kauj ruam yog kauj ruam cov lus qhia.
Saib lwm cov kev qhia kos duab rau cov menyuam yaus hauv cov tshooj lus cais:
Yuav ua li cas kos ib dais rau ib tug me nyuam
Yuav ua li cas kos ib lub snowdrop yooj yim 
Yuav ua li cas kos tus me nyuam yooj yim 
Tiyas
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