Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
va triet » va thiet, va trien, ve triet
sach thu » sach thieu, sach tham, cach thuc
hieu van » hieu va, thien van, lieu va
tuc van » thuc van, truc van, tuc va
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau

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 thue) or (sach thu)) nang xa hoi. hieu van cam tuc van ((hang di) OR (hang vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thue) OR (sach thu)) nang xa hoi. hieu van cam tuc van ((hang di) OR (hang vi)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thue) or (sach thu)) nang xa hoi. hieu van cam tuc van ((hang di) OR (hang vi)) va triet*".