Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach tai » sach bai, sach tham, sach dao
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
su triet » su viet, su tien, ve triet
tai lang » tai cong, thi lan, tai san
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao toc
cao suc » cao su, cao duc
lang xa » lang ha, dang xay, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach tai lang xa hoi. hieu va ((cao tuc) or (cao suc)) ((van hanh) OR (ban hanh)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tai lang xa hoi. hieu va ((cao tuc) OR (cao suc)) ((van hanh) OR (ban hanh)) va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tai lang xa hoi. hieu va ((cao tuc) or (cao suc)) ((van hanh) OR (ban hanh)) va su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach tai lang xa hoi. hieu va ((cao tuc) or (cao suc)) ((van hanh) OR (ban hanh)) va su triet*.