Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
thanh cung » thanh cuong, thanh cong, thanh tung
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
cung cap » trung cap
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu quang)) - thanh cung cap ((nhung cong) OR (thong cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu quang)) - thanh cung cap ((nhung cong) OR (thong cong)) tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu quang)) - thanh cung cap ((nhung cong) OR (thong cong)) tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quang)) - thanh cung cap ((nhung cong) OR (thong cong)) tan toan ban*.