Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
nhieu tang » hieu lang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
trung va » truong va, trang va, trung ha
tam toan » tap toan, tam than, pham toan
pham tan » pham tuan, pham van, pham tai

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) or (nhieu tang)) - thanh trung va nhung cong ((tam toan) or (pham tan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (nhieu tang)) - thanh trung va nhung cong ((tam toan) OR (pham tan)) ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (nhieu tang)) - thanh trung va nhung cong ((tam toan) or (pham tan)) ban*.