Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh tai, hanh van
tai lang » tai cong, thi lan, tai san
cam tuc » cam xuc, cam tu, nam thuc
hanh va » hang va, hanh vi
tu sach » thu sach, te sach, tu cach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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