Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hang dai » hoang dai, hang tai, hang dau
hieu van » hieu va, thien van, lieu va
va hang » van hang, va nang, va lang
bao luc » bao thuc
ban luc » van luc, nang luc, nhan luc
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
dai ve » dap ve, dau ve, dai va
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su sach)) ky tang xa hoi. hieu van ((ban luc) OR (bao luc)) va hang dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky tang xa hoi. hieu van ((ban luc) OR (bao luc)) va hang dai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su sach)) ky tang xa hoi. hieu van ((ban luc) OR (bao luc)) va hang dai ve triet".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) ky tang xa hoi. hieu van ((ban luc) OR (bao luc)) va hang dai ve triet*.