Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
hoc sach » hoc sinh, hoc cac, hoc anh
thanh va » thanh van, hanh va, thanh ha
xuc ban » duc ban, cuc ban, quoc ban
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
va cua » va chua, via cua, ca cua
ve cam » ve cham, ve cac, va cam

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 (hoc sach)) ty lang xa hoi. hieu ((ve cam) or (va cac)) xuc ban thanh va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (hoc sach)) ty lang xa hoi. hieu ((ve cam) OR (va cac)) xuc ban thanh va cua viet.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (hoc sach)) ty lang xa hoi. hieu ((ve cam) or (va cac)) xuc ban thanh va cua viet*.