Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hau luc » hau loc, cau luc, hieu luc
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
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 hoi. hieu van ((hau luc) OR (nhan luc)) van hanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van ((hau luc) OR (nhan luc)) van hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van ((hau luc) OR (nhan luc)) van hanh de cua tre*.