Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh di » thanh doi, thanh de, thanh do
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac luc » cau luc, coc luc, cac cuoc
sach tu » sach thu, cach tu, sach ty
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
hang x » hoang xa, chang xu, hang nxb
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: so sach tu ((hang x) or (nang x)) hoi. hieu va ((cac luc) OR (cac nuoc)) gia thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu ((hang x) OR (nang x)) hoi. hieu va ((cac luc) OR (cac nuoc)) gia thanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tu ((hang x) or (nang x)) hoi. hieu va ((cac luc) OR (cac nuoc)) gia thanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach tu ((hang x) or (nang x)) hoi. hieu va ((cac luc) OR (cac nuoc)) gia thanh di cua triet*.