Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
danh vi » hanh vi, dinh vi, danh di
cao hoi » cau hoi, co hoi, cao hoc
van dau » van dao, phan dau
xac ky » cac ky, sac ky
bac ky » cac ky, ban ky, sac ky
sua va » suat va, xua va
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((xac ky) OR (bac ky)) nang cao hoi. hieu van dau ((sua va) or (vua va)) danh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((xac ky) OR (bac ky)) nang cao hoi. hieu van dau ((sua va) OR (vua va)) danh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((xac ky) OR (bac ky)) nang cao hoi. hieu van dau ((sua va) or (vua va)) danh vi su triet".
• Adding a wildcard symbol may retrieve word variants: thu ((xac ky) OR (bac ky)) nang cao hoi. hieu van dau ((sua va) or (vua va)) danh vi su triet*.