Perhaps you should try some spelling variations:
va thuat » ky thuat, ki thuat, va thuc
thanh vi » hanh vi, thanh va, thanh ve
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
te cao » te bao
ha hoi » hoa hoi, ha noi, xa hoi
loc va » luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cao ky lang ha hoi. hieu va thuat ((loc va) or (hoc va)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky lang ha hoi. hieu va thuat ((loc va) OR (hoc va)) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te cao ky lang ha hoi. hieu va thuat ((loc va) or (hoc va)) thanh vi cua tre*.