Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh vien » doanh tien, doanh chien, thanh vien
cac truc » cau truc, cac tru, cac trung
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach o lang xa hoi. hieu qua cac truc va ((doanh vien) or (anh viet)) cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach o lang xa hoi. hieu qua cac truc va ((doanh vien) OR (anh viet)) cac tro.
• Adding a wildcard symbol may retrieve word variants: thuoc sach o lang xa hoi. hieu qua cac truc va ((doanh vien) or (anh viet)) cac tro*.