Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
danh vai » danh sai, danh va, doanh van
hieu van » hieu va, thien van, lieu va
vai cau » va cau, van cau, vai cac
va danh » va dinh, va dan, va hanh
cam tuc » cam tu, nam thuc, dam thuc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va

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 thi nang xa hoi. ((hieu ve) or (hieu van)) ((cam tuc) OR (cam xuc)) va danh vai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang xa hoi. ((hieu ve) OR (hieu van)) ((cam tuc) OR (cam xuc)) va danh vai cau theo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi nang xa hoi. ((hieu ve) or (hieu van)) ((cam tuc) OR (cam xuc)) va danh vai cau theo*".