Perhaps you should try some spelling variations:
doanh cua » doanh luan
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
danh va » doanh va, hanh va, anh va
van cam » van nam, van lam, van cau
ky tang » ky dang, kho tang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ((ky tang) OR (ky nang)) ma hoi. hieu van cam tuc xa ((danh va) or (doanh cua)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ((ky tang) OR (ky nang)) ma hoi. hieu van cam tuc xa ((danh va) OR (doanh cua)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ((ky tang) OR (ky nang)) ma hoi. hieu van cam tuc xa ((danh va) or (doanh cua)) ve triet".
• Adding a wildcard symbol may retrieve word variants: te sai ((ky tang) OR (ky nang)) ma hoi. hieu van cam tuc xa ((danh va) or (doanh cua)) ve triet*.