Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
lanh 2 » lan 2
cam lo » nam lo, cam ly, cam o
2 tang » 2 thang, 6 tang, 7 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat lanh 2 tang ((ma hoi) or (ma hoa)). hieu van ((cham soc) or (cam lo)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh 2 tang ((ma hoi) OR (ma hoa)). hieu van ((cham soc) OR (cam lo)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat lanh 2 tang ((ma hoi) or (ma hoa)). hieu van ((cham soc) or (cam lo)) va hanh dai cua tre*.