Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
sach tu » sach thu, cach tu, sach ty
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc
duc gia » quoc gia
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sach tu)) ((tang ma) or (lang xa)) hoi. hieu qua cam duc gia thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach tu)) ((tang ma) OR (lang xa)) hoi. hieu qua cam duc gia thanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach tu)) ((tang ma) or (lang xa)) hoi. hieu qua cam duc gia thanh tai cua triet*.