Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh tai » thanh hai, doanh tai, thanh san
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
cau duc » cao duc, cau luc, chu duc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cau » ke cau, va cau, ve cac

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 duc va ((thanh tai) or (thanh toan)) 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 duc va ((thanh tai) OR (thanh toan)) va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (dang xay)) hoi. hieu ve cau duc va ((thanh tai) or (thanh toan)) va triet*.