Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cua thong » cua thuong, cua khong, cua tong
thong tan » thong than, thong tran, thong tin
ho chieu » theo chieu, hoc thieu, doi chieu
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 sang - ((thanh trung) or (canh tranh)) cua thong thong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((thanh trung) OR (canh tranh)) cua thong thong tan toan ban*.