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
cua truc » cua tuc, cua thuoc, cua trung
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cua » quan cua, quang cua, qua quan
truc va » thuc va, thuc vat, trung va

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 cua truc va ((danh vien) or (doanh vien)) cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu qua cua truc va ((danh vien) OR (doanh vien)) cac tro.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu qua cua truc va ((danh vien) or (doanh vien)) cac tro*.