Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
vang xa » lang xa, mang xa, ang xa
va hanh » van hanh, va thanh, va danh
cam luc » cau luc
hieu ve » hieu va, hieu van
ly vang » ly hang, ly van, ly quang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ly vang xa hoi. hieu ve ((cam luc) or (cam xuc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly vang xa hoi. hieu ve ((cam luc) OR (cam xuc)) va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ly vang xa hoi. hieu ve ((cam luc) or (cam xuc)) va hanh vi cua tre*.