Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, nhieu tang, hieu van
hanh tram » hanh tam, hanh trang, thanh tran
van thong » van thuong, van phong, va thong
tram van » tran van, tam van, trang van
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: hoc ((hieu lang) or (hieu quang)) - hanh tram van thong cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (hieu quang)) - hanh tram van thong cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (hieu quang)) - hanh tram van thong cong van toan ban*.