Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
toc sai » toc san, toc dai, thuoc sai
lam cua » nam cua, lam chat
van cam » van nam, van lam, van cau
dai hoi » dai hoc, dai hai, dai moi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
luc va » tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sai ky dang ((ma hoa) or (dai hoi)). hieu van cam ((duc va) or (luc va)) thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sai ky dang ((ma hoa) OR (dai hoi)). hieu van cam ((duc va) OR (luc va)) thanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sai ky dang ((ma hoa) or (dai hoi)). hieu van cam ((duc va) or (luc va)) thanh lam cua tre*.