Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
than luc » than duc, thanh luu, thuy luc
nhan luc » nang luc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vi cua » vai cua
di cua » dai cua, doi 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: thu sach ky nang xa hoi. hieu qua ((than luc) or (nhan luc)) van thanh ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu qua ((than luc) OR (nhan luc)) van thanh ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu qua ((than luc) or (nhan luc)) van thanh ((vi cua) OR (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu qua ((than luc) or (nhan luc)) van thanh ((vi cua) OR (di cua)) triet*.