Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
danh vien » doanh vien, danh viet, danh kien
dan vien » dan viet, nhan vien, danh viet
ca truc » cau truc, ca tru, dai truc
sach ky » sac ky, sach y, sach ty
ba truc » cau truc, ba trung, dai truc
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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