Perhaps you should try some spelling variations:
thien van » thi van
tang van » dang van, hoang van, trong van
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
tang ma » mang may
cua tre » cuu tre, cua triet, dua tren
van dau » van dao, phan dau
dau tuc » dau tu, dao tuc, cau truc
tu sac » tu sach, tu cac, tu san
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((tang ma) or (tang van)) hoi. thien van dau tuc va hanh vai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((tang ma) OR (tang van)) hoi. thien van dau tuc va hanh vai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((tang ma) or (tang van)) hoi. thien van dau tuc va hanh vai ((cua tre) OR (cua te))*".