Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, qua ca, qua cai
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
vien da » vien dai, hien dai
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
da tro » de tro, va tro, da tao

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