Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cham luc » cham soc, nhan luc, cham cuu
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach
lang xa » lang ha, dang xay
vu sach » vu bach, vu khach
luc va » duc va, tuc va, loc va
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 ((lang xa) OR (lang van)) hoi. hieu vu cham luc va danh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) van ((lang xa) OR (lang van)) hoi. hieu vu cham luc va danh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) van ((lang xa) OR (lang van)) hoi. hieu vu cham luc va danh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) van ((lang xa) OR (lang van)) hoi. hieu vu cham luc va danh vi cua vat*.