Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
cac trung » cac truong, dac trung, bac trung
thu sach » tu sach, thuat sach, thuoc sach
trung va » truong va, trang va, trung ha
va doanh » van doanh, vay doanh, va danh
vien cac » vien bach, vien dai, vien da
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
qua cac » cua cac

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