Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dinh cuu » dinh chi
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
thai do » thai den
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
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 tang xa hoi. hieu van ((thai do) OR (thay doi)) va hanh ((vi cuu) OR (dinh cuu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang xa hoi. hieu van ((thai do) OR (thay doi)) va hanh ((vi cuu) or (dinh cuu)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang xa hoi. hieu van ((thai do) OR (thay doi)) va hanh ((vi cuu) or (dinh cuu)) tre*.