Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
tu cach » tu cac
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cach tu » cach thuc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
soc va » hoc va, loc va, doc va
ma hoi » mai hoi, xa hoi, me hoi
tu san » thu san, tu ban, tu can

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 tu san ((ma hoi) or (ma hoa)). hieu ve cham soc va hanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu san ((ma hoi) OR (ma hoa)). hieu ve cham soc va hanh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu cach tu san ((ma hoi) or (ma hoa)). hieu ve cham soc va hanh lai ((cua tre) or (cuu tre))*.