Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
cua triet » cua viet, su triet, va triet
sach ty » sach tu, sach thu, xach tay
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
duc gia » quoc gia
lam cua » nam cua, lam chat
ha hoi » hoa hoi, xa hoi, va hoi

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 y) or (sach ty)) lang ((ha hoi) OR (ha noi)). hieu qua cac duc gia thanh lam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) lang ((ha hoi) OR (ha noi)). hieu qua cac duc gia thanh lam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach y) or (sach ty)) lang ((ha hoi) OR (ha noi)). hieu qua cac duc gia thanh lam cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach ty)) lang ((ha hoi) OR (ha noi)). hieu qua cac duc gia thanh lam cua triet*.