Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
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 (thu hoach)) ky dang xa hoi. ((hieu ve) or (lieu va)) cam luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky dang xa hoi. ((hieu ve) OR (lieu va)) cam luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky dang xa hoi. ((hieu ve) or (lieu va)) cam luc va hanh vi cua tre*.