Perhaps you should try some spelling variations:
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
hanh day » hanh may, han day, hanh dao
cua tre » cua te, cuu tre, cua triet
day cua » dai cua
hieu va » lieu va, hieu qua
cam luc » cau luc
va hanh » van hanh, va thanh, va danh
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bai ky ((lang van) OR (tang van)) hoi. hieu va ((cam luc) or (cam xuc)) va hanh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky ((lang van) OR (tang van)) hoi. hieu va ((cam luc) OR (cam xuc)) va hanh day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky ((lang van) OR (tang van)) hoi. hieu va ((cam luc) or (cam xuc)) va hanh day cua tre".
• Adding a wildcard symbol may retrieve word variants: tu bai ky ((lang van) OR (tang van)) hoi. hieu va ((cam luc) or (cam xuc)) va hanh day cua tre*.