Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
than luc » nhan luc, than duc, thanh luu
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
luc van » luoc van, luu van, duc van
nang xa » nang x, lang xa, mang xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) than luc van thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (nang ma)) hoi. ((hieu va) OR (hieu qua)) than luc van thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) than luc van thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) than luc van thanh vi cua triet*.