Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
va triet » va thiet, va trien, ve triet
sach thi » sach thu, sach tai, sach thieu
hanh dam » thanh dam, hanh lam, hanh nam
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
hieu ve » hieu van
hanh xa » hanh va, hanh ma, hanh xu
tuc va » thuc va, truc va, tuc xa
dam va » dam van, nam va, dam ha

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 thi) or (sach thue)) hanh xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh dam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thue)) hanh xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh dam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thi) or (sach thue)) hanh xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh dam va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thue)) hanh xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh dam va triet*.