Perhaps you should try some spelling variations:
thanh cac » hanh cac, thanh bac, thanh ca
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
cac cua » cach cua, cac qua, ca cua
hieu ve » hieu va, hieu van
van hoe » van hoa, van hoc, van hieu
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
luc va » duc va, tuc va
loc va » hoc va
vu sac » vu sach, vu san, va sac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky lang van hoe. hieu ve cac ((luc va) or (loc va)) thanh cac cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky lang van hoe. hieu ve cac ((luc va) OR (loc va)) thanh cac cua tre*.