Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, hieu van
thong anh » thong danh, thong lanh, hong anh
va thong » va thuong, va phuong, he thong
anh van » anh va, thanh van, doanh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) OR (nhieu tang)) - ((thanh trung) or (hanh trinh)) va thong thong anh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (nhieu tang)) - ((thanh trung) OR (hanh trinh)) va thong thong anh van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) OR (nhieu tang)) - ((thanh trung) or (hanh trinh)) va thong thong anh van ban".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) OR (nhieu tang)) - ((thanh trung) or (hanh trinh)) va thong thong anh van ban*.