Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cac lo » cac lop, cac co, cac bo
lo ban » co ban, lo van, ly ban
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach ty)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo ban thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo ban thanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach ty)) nang xa hoi. ((hieu ve) OR (hieu va)) cac lo ban thanh di cua triet*".