Perhaps you should try some spelling variations:
chap thuong » chan thuong, phan thuong, pham thuong
thanh trung » thanh tung
chiet tach » chieu sach
nhieu tang » chieu sang, hieu lang, nhiet nang
phap phong » hai phong, phap phan
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (nhieu tang)) - thanh trung ((chap thuong) or (phap phong)) cong hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (nhieu tang)) - thanh trung ((chap thuong) OR (phap phong)) cong hach toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (nhieu tang)) - thanh trung ((chap thuong) or (phap phong)) cong hach toan cau*.