Perhaps you should try some spelling variations:
hanh de » hanh ve, hanh kem
ve chat » va chat, van chat
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
ban ky » van ky, dan ky
huu va » cuu va
tuu va » tu va, cuu va, tru va
de cua » le cua, te cua, dieu cua
te ban » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ban ky tang ((van hoc) OR (van hoa)). hieu ve chat ((huu va) or (tuu va)) hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ky tang ((van hoc) OR (van hoa)). hieu ve chat ((huu va) OR (tuu va)) hanh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ban ky tang ((van hoc) OR (van hoa)). hieu ve chat ((huu va) or (tuu va)) hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te ban ky tang ((van hoc) OR (van hoa)). hieu ve chat ((huu va) or (tuu va)) hanh de cua tre*.