Perhaps you should try some spelling variations:
lang mai » lang dai, lang hai, lang man
dam thuc » am thuc, dan thuc, nam thuc
ky lang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cam tu » cam thu, nam tu, dam tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky lang mai hoi. hieu ve ((dam thuc) or (cam tu)) va hanh vi ((cua vat) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang mai hoi. hieu ve ((dam thuc) OR (cam tu)) va hanh vi ((cua vat) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: su sac ky lang mai hoi. hieu ve ((dam thuc) or (cam tu)) va hanh vi ((cua vat) or (hoa viet))*.