Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
trung tham » trung tam, trung thanh, trung thang
tham nhung » thi nhung
cphong van » phung van, thong van, phong va
hieu lang » chieu sang, nhieu tang, hieu van
phong van » phung van, thong van, phong va
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 ((hieu lang) or (hieu quang)) - thanh trung tham nhung ((cphong van) or (phong van)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (hieu quang)) - thanh trung tham nhung ((cphong van) OR (phong van)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (hieu quang)) - thanh trung tham nhung ((cphong van) or (phong van)) toan cao*.