Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
dinh cuu » dinh chi
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
bao ky » cao ky, ban ky, bac ky
ma hoi » mai hoi, xa hoi, ma hoa
loc va » luc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te bao ky tang ma hoi. hieu van tham ((hoc va) or (loc va)) hanh ((vi cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te bao ky tang ma hoi. hieu van tham ((hoc va) OR (loc va)) hanh ((vi cuu) OR (dinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: te bao ky tang ma hoi. hieu van tham ((hoc va) or (loc va)) hanh ((vi cuu) or (dinh cuu)) tre*.