Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
doanh va » doan va, doanh tai, doanh cua
ven dam » van dam, men dam, vien dai
danh va » hanh va, anh va, dan va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ve dam » ke dam, va dam, ve dao
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu ((ve dam) or (ven dam)) tu va ((danh va) OR (doanh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((ve dam) OR (ven dam)) tu va ((danh va) OR (doanh va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ((ve dam) or (ven dam)) tu va ((danh va) OR (doanh va)) su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((ve dam) or (ven dam)) tu va ((danh va) OR (doanh va)) su triet*.