Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
sang ky » sang kyo, dang ky, tang ky
cao suc » cao su, cao duc
cao xuc » cam xuc, cao duc, chat xuc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
dan ky » van ky
doi su » oi su, don su, voi su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sang ky) or (dan ky)) dang xay hoi. hieu va ((cao xuc) OR (cao suc)) van hanh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sang ky) OR (dan ky)) dang xay hoi. hieu va ((cao xuc) OR (cao suc)) van hanh doi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sang ky) or (dan ky)) dang xay hoi. hieu va ((cao xuc) OR (cao suc)) van hanh doi su triet*".