Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
thu sach » thuat sach, thuoc sach, thu hoach
thuc dan » thuc hanh, hoc dan, thuc vat
vien cac » vien bach, vien dai, vien da
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
qua cai » qua hai, qua cac, qua ca
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) or (tu sach)) ky nang xa hoi. hieu qua cai ((truc va) or (thuc dan)) doanh vien cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu qua cai ((truc va) OR (thuc dan)) doanh vien cac tro.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang xa hoi. hieu qua cai ((truc va) or (thuc dan)) doanh vien cac tro*.