Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
dinh cuu » dinh chi
nang ma » tang ma, sang ma, nang cao
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
soc va » loc va, doc va, goc va
vi cuu » vi luu, vinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. hieu van cham ((soc va) OR (hoc va)) hanh ((vi cuu) OR (dinh cuu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ma hoi. hieu van cham ((soc va) OR (hoc va)) hanh ((vi cuu) or (dinh cuu)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu van cham ((soc va) OR (hoc va)) hanh ((vi cuu) or (dinh cuu)) tre*.