Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dan vien » dan viet, nhan vien, danh viet
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, 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: thuoc sach ky lang xa hoi. hieu qua cau truc va ((dan vien) or (anh viet)) cac tro~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky lang xa hoi. hieu qua cau truc va ((dan vien) OR (anh viet)) cac tro.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky lang xa hoi. hieu qua cau truc va ((dan vien) or (anh viet)) cac tro*.