Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cham luc » cham soc, nhan luc, cham cuu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (tu sach)) tu ((lang xa) or (nang x)) hoi. hieu va cham luc va danh va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (tu sach)) tu ((lang xa) OR (nang x)) hoi. hieu va cham luc va danh va cua viet.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (tu sach)) tu ((lang xa) or (nang x)) hoi. hieu va cham luc va danh va cua viet*.