Perhaps you should try some spelling variations:
dinh cuu » dinh chi
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
loc va » hoc va, luc va
vi cuu » vi luu, vinh cuu
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
soc va » hoc va, doc va, goc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ha hoi. hieu van tham ((soc 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 sac ky dang ha hoi. hieu van tham ((soc va) OR (loc va)) hanh ((vi cuu) OR (dinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ha hoi. hieu van tham ((soc va) or (loc va)) hanh ((vi cuu) or (dinh cuu)) tre*.