Perhaps you should try some spelling variations:
va tieng » va tinh, tu tieng, va thong
hanh vai » hanh vi, hanh va, hanh tai
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
sach lo » sach dao, sach doi, sach hoi
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve am » va am
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach lo ((nang xa) or (nang ma)) hoi. hieu ve am thuc day hanh vai ((va tieng) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo ((nang xa) OR (nang ma)) hoi. hieu ve am thuc day hanh vai ((va tieng) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: su sach lo ((nang xa) or (nang ma)) hoi. hieu ve am thuc day hanh vai ((va tieng) or (va thiet))*.