Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
danh vien » danh viet, dan vien, danh kien
thu sach » tu sach, thuat sach, thuoc sach
sach ly » sach y, sach lo, sach ty
ca truc » cau truc, ca tru, ba truc
truc va » thuc va, thuc vat, trung va
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, ma hoa, me hoi
qua ca » qua cac, qua cua, qua cai

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 ly nang ((ma hoi) or (xa hoi)). hieu qua ca truc va ((danh vien) OR (doanh vien)) cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang ((ma hoi) OR (xa hoi)). hieu qua ca truc va ((danh vien) OR (doanh vien)) cac tro.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang ((ma hoi) or (xa hoi)). hieu qua ca truc va ((danh vien) OR (doanh vien)) cac tro".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang ((ma hoi) or (xa hoi)). hieu qua ca truc va ((danh vien) OR (doanh vien)) cac tro*.