Perhaps you should try some spelling variations:
bach xuan » anh xuan, bach qua, sach luan
bieu vien » bieu hien, bieu dien, dieu kien
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
xuan va » xuat va, luan va, quan va
va hang » van hang, va nang, va lang
cau tre » cau treo, cau tra, cuu tre

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) or (te sach)) ky nang xa hoi. bieu vien bach xuan va hang va ((cau tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang xa hoi. bieu vien bach xuan va hang va ((cau tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky nang xa hoi. bieu vien bach xuan va hang va ((cau tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang xa hoi. bieu vien bach xuan va hang va ((cau tre) OR (cau tren))*.