Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
hanh di » hanh de, hang di, danh di
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
tham do » pham do, tham du, thay doi
ky lang » ky nang, ky dang, ky tang
thai do » thay doi, thai den
te cao » 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 cao ky lang van hoi. hieu va ((tham do) OR (thai do)) va ((hanh di) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky lang van hoi. hieu va ((tham do) OR (thai do)) va ((hanh di) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky lang van hoi. hieu va ((tham do) OR (thai do)) va ((hanh di) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te cao ky lang van hoi. hieu va ((tham do) OR (thai do)) va ((hanh di) or (hanh vi)) cua tre*.