Perhaps you should try some spelling variations:
dinh cuu » dinh chi
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
bao ky » cao ky, ban ky, bac ky
loc va » luc va
vi luu » vi lua

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