Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cao suc » cao su, cao duc
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, va hoi
ve cao » va cao, ve bao, ve cac
suc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu ve cao suc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuat sach)) ky nang ((ha hoi) OR (xa hoi)). hieu ve cao suc va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu ve cao suc va hanh va cua tre*.