Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
hieu cua » hieu qua, dieu cua, bieu cua
thanh ve » hanh ve, thanh va, thanh vien
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, mang xa, ang xa
nang ma » tang ma, sang ma, nang cao
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
ve cua » le cua, de cua, te 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 ((((nang xa) OR (nang x))) or (nang ma)) hoi. hieu cua cac luc van thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((((nang xa) OR (nang x))) OR (nang ma)) hoi. hieu cua cac luc van thanh ve cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((((nang xa) OR (nang x))) or (nang ma)) hoi. hieu cua cac luc van thanh ve cua triet*".