Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
nhan luc » nang luc
hanh de » hanh ve, hanh kem
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hau luc » hau loc, cau luc, hieu luc
de cua » le cua, te cua, dieu 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 ma)) hoi. lieu va ((hau luc) or (nhan luc)) van hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. lieu va ((hau luc) OR (nhan luc)) van hanh de cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. lieu va ((hau luc) or (nhan luc)) van hanh de cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang ma)) hoi. lieu va ((hau luc) or (nhan luc)) van hanh de cua triet*.