Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
hieu quang » thieu quang, hieu quan, hieu qua
quang cua » quan cua, quang tuan, quang huy
danh viet » anh viet, ninh viet, nang viet
cua truc » cua tuc, cua thuoc, cua trung
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
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: tu sach ky nang xa hoi. hieu quang cua truc va ((danh viet) or (doanh vien)) cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu quang cua truc va ((danh viet) OR (doanh vien)) cac tro.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu quang cua truc va ((danh viet) or (doanh vien)) cac tro*.