Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
thu tang » thu trang, thu thang, thu hang
kham duc » pham duc, kham cuoc, pham duy
hanh va » hang va
vu kham » vu khanh
so sach » so sanh, bo sach, co sach
hieu vu » hieu va, hieu ve, hieu su
ma hoi » mai hoi, ma hoa, me hoi

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 tang ((ma hoi) or (xa hoi)). hieu vu kham duc va ((hanh va) OR (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu tang ((ma hoi) OR (xa hoi)). hieu vu kham duc va ((hanh va) OR (hanh vi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu tang ((ma hoi) or (xa hoi)). hieu vu kham duc va ((hanh va) OR (hanh vi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach thu tang ((ma hoi) or (xa hoi)). hieu vu kham duc va ((hanh va) OR (hanh vi)) cua triet*.