Perhaps you should try some spelling variations:
cong thuong » hang thuong
dung thuong » dung trong, hang thuong, dung thuoc
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
dung khong » dung khang, dung hong, dung phong
doi chieu » doc hieu, doi chi, ho chieu
dan toan » van toan, dan than, manh toan
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 chieu sang - hanh trinh quan ((dung khong) or (((dung thuong) or (cong thuong)))) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh trinh quan ((dung khong) OR (((dung thuong) OR (cong thuong)))) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh trinh quan ((dung khong) or (((dung thuong) or (cong thuong)))) dan toan cao*.