Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu vien » hieu hien, hieu viec, hieu tieng
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cac toc » cac toi, cac nuoc, cac thoi
van anh » van thanh, van minh
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa
ve su » va su
tuan » quan, tran, luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ma hoi. ((hieu vien) or (thieu nien)) cac toc ((van anh) OR (tuan anh)) ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. ((hieu vien) OR (thieu nien)) cac toc ((van anh) OR (tuan anh)) ve su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. ((hieu vien) or (thieu nien)) cac toc ((van anh) OR (tuan anh)) ve su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. ((hieu vien) or (thieu nien)) cac toc ((van anh) OR (tuan anh)) ve su triet*.