Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
sach va » sach ha, sach dao, sach nha
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sach xa » sach dao, sach nha, sach bai
dai hoa » dai khoa, dai hoc, dai hoi
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach va) or (sach xa)) ((nang xa) or (nang ma)) hoi. hieu vu cham soc va hanh dai hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach va) OR (sach xa)) ((nang xa) OR (nang ma)) hoi. hieu vu cham soc va hanh dai hoa viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach va) or (sach xa)) ((nang xa) or (nang ma)) hoi. hieu vu cham soc va hanh dai hoa viet*.