Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
su triet » su viet, su tien, ve triet
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac toc » cac toi, cac nuoc, cac thoi
va hang » van hang, va nang, va lang
ve cac » va cac, vien cac
toc va » hoc va, toc ta, tuc va
tai su » tai so, tai tu, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (lang xa)) hoi. hieu ve cac toc va hang tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (lang xa)) hoi. hieu ve cac toc va hang tai su triet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (lang xa)) hoi. hieu ve cac toc va hang tai su triet*.