Perhaps you should try some spelling variations:
thong thuong » thong thong, hang thuong, cong thuong
thuong luong » theo luong, cong luong
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
trang va » tran van, hang va
toan tai » toan tap, doanh tai, toan cao
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: doi hieu lang - hanh trang va ((thuong luong) or (thong thuong)) danh ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh trang va ((thuong luong) OR (thong thuong)) danh ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh trang va ((thuong luong) or (thong thuong)) danh ((toan tai) or (toan ban))*.