Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
han tai » hang tai, nhan tai, van tai
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
va han » va phan, van han, va hanh
tai va » thai va, mai va, tri va

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 y ((nang xa) or (dang xay)) hoi. hieu ve cau luc va han tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (dang xay)) hoi. hieu ve cau luc va han tai va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (dang xay)) hoi. hieu ve cau luc va han tai va triet*.