Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hang » van khang, van hoang, van thang
su sach » so sach
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
hang xa » hoang xa, hang va, hang ca
vu sach » vu bach, vu khach
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) van hang xa hoi. hieu vu cham luc ((va dinh) or (va tinh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) van hang xa hoi. hieu vu cham luc ((va dinh) OR (va tinh)) vi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) van hang xa hoi. hieu vu cham luc ((va dinh) or (va tinh)) vi cua vat*.