Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
thanh vi » hanh vi, thanh va, thanh ve
ky sang » ky nang, ky dang, ky tang
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
luc ban » duc ban, cuc ban, luc bat
hieu va » lieu va, hieu qua
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 sang ((xa hoi) or (ma hoa)). ((hieu ve) OR (hieu va)) nhan luc ban thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky sang ((xa hoi) OR (ma hoa)). ((hieu ve) OR (hieu va)) nhan luc ban thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky sang ((xa hoi) or (ma hoa)). ((hieu ve) OR (hieu va)) nhan luc ban thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thu sach ky sang ((xa hoi) or (ma hoa)). ((hieu ve) OR (hieu va)) nhan luc ban thanh vi cua vat*.