Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thi nang » thi cong, ki nang, thi hanh
hieu van » thien van, lieu va, hieu ve
hang loi » thang loi, hang doi, tang loi
sach thi » sach thu, sach tai, sach thieu
va hang » van hang, va nang, va lang
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
lam tuc » lam thuoc, lam truoc, luat tuc
tuc va » thuc va, truc va, tuc xa

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