Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
chua bang » chu bang, chua nang, thuat bang
chua xang » chua nang, chuc nang, chu bang
duong van » duong va, luong va, dang van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((hieu lang) or (hieu qua)) - thanh tung ((chua bang) or (chua xang)) duong van tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (hieu qua)) - thanh tung ((chua bang) OR (chua xang)) duong van tuan cau.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (hieu qua)) - thanh tung ((chua bang) or (chua xang)) duong van tuan cau*.