Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu van
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach thu)) xang xa hoi. ((hieu ve) or (hieu va)) pham duc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) xang xa hoi. ((hieu ve) OR (hieu va)) pham duc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) xang xa hoi. ((hieu ve) or (hieu va)) pham duc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) xang xa hoi. ((hieu ve) or (hieu va)) pham duc va hanh vai cua te*.