Perhaps you should try some spelling variations:
danh vai » danh sai, doanh van, dang van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cuu tre, cua triet, dua tren
danh va » doanh va, hanh va, anh va
cac toc » cac toi, cac nuoc, cac thoi
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
toc xa » tuc xa, toc ta, hoc xa
ve cac » va cac, vien cac
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: te sach ky nang xa hoi. hieu ve cac toc xa ((danh vai) or (danh va)) ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve cac toc xa ((danh vai) OR (danh va)) ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve cac toc xa ((danh vai) or (danh va)) ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve cac toc xa ((danh vai) or (danh va)) ((cua tre) OR (cua te))*.