Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
cau treo » cau theo, cau tren, cau triet
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
cac hoc » cach hoc, cac hop, bac hoc
vai cau » va cau, van cau, vai cac
hoc van » hoc dan, hoc va, hoc vat
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach thu)) nang xa hoi. ((hieu viec) OR (hieu ve)) cac hoc van hanh vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach thu)) nang xa hoi. ((hieu viec) OR (hieu ve)) cac hoc van hanh vai cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach thu)) nang xa hoi. ((hieu viec) OR (hieu ve)) cac hoc van hanh vai cau treo*".