Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
danh va » doanh va, hanh va, dan va
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu
anh va » hanh va

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