Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh te » thanh ve, thanh de, thanh le
sach ky » sach y, sach ty, sach kem
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
qua cac » cua cac
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sac ky » cac ky, sai ky
te cua » tue cua, le 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 (sac ky)) ((nang xa) or (nang ma)) hoi. hieu qua cac luc van thanh te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) ((nang xa) OR (nang ma)) hoi. hieu qua cac luc van thanh te cua triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) ((nang xa) or (nang ma)) hoi. hieu qua cac luc van thanh te cua triet*.