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

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 hoi) or (van hoe)). hieu ve cac loc va thanh cac cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky lang ((van hoi) OR (van hoe)). hieu ve cac loc va thanh cac cua tre*.