Perhaps you should try some spelling variations:
dang van » hoang van, hang va
su sach » so sach, vu sach
cac tuc » cac toc, cac tu, cac tac
va tinh » may tinh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
su tien » su kien, su hien, tu tieng
doi su » oi su, don su, voi su

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 ((lang xa) or (dang van)) hoi. hieu va cac tuc ((gia thanh) or (va tinh)) doi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (dang van)) hoi. hieu va cac tuc ((gia thanh) OR (va tinh)) doi su tien.
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) or (dang van)) hoi. hieu va cac tuc ((gia thanh) or (va tinh)) doi su tien*.