Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh tu » anh tu, doanh thu
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
tu cua » hu cua, vu cua
cua te » cua tu

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 ty lang xa hoi. ((hieu ve) OR (hieu van)) cac ((truc va) or (duc va)) danh tu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. ((hieu ve) OR (hieu van)) cac ((truc va) OR (duc va)) danh tu cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty lang xa hoi. ((hieu ve) OR (hieu van)) cac ((truc va) or (duc va)) danh tu cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. ((hieu ve) OR (hieu van)) cac ((truc va) or (duc va)) danh tu cua te*.