Perhaps you should try some spelling variations:
hieu nghia » hieu gia
toc hieu » toc thieu, doc hieu, hoc thieu
nghia xa » nghia mac
trung bo » truong bo, trung hoc, trung hoa
su sach » vu sach
so sach » so sanh, bo sach, co sach
hoa toc » hoa hoc, ho toc, hoa doc
doc vi » hoc vi, don vi, doc 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) OR (so sach)) hoa toc hieu nghia xa ets : ((trung bo) or (nhung bai)) doc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) hoa toc hieu nghia xa ets : ((trung bo) OR (nhung bai)) doc vi đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) hoa toc hieu nghia xa ets : ((trung bo) or (nhung bai)) doc vi đai".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) hoa toc hieu nghia xa ets : ((trung bo) or (nhung bai)) doc vi đai*.