Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu nang xa hoi. ((hieu ve) or (hieu qua)) cam tu va hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang xa hoi. ((hieu ve) OR (hieu qua)) cam tu va hanh vi ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: so sach thu nang xa hoi. ((hieu ve) or (hieu qua)) cam tu va hanh vi ((cua triet) or (su triet))*.