Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chat quang » chat luong, pham quang
cua thuong » cua truong, cua phuong, ca thuong
chu quang » vu quang
nhanh bac » nhanh ha, nhanh va
nhanh ba » nhanh ha, nhanh va, thanh ba
cong san » cong tac
san chan » san chang, dan chan, san chay
chan ban » can ban, chat ban, chan nan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu quang) OR (chat quang)) - ((nhanh bac) or (nhanh ba)) cua thuong cong san chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu quang) OR (chat quang)) - ((nhanh bac) OR (nhanh ba)) cua thuong cong san chan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu quang) OR (chat quang)) - ((nhanh bac) or (nhanh ba)) cua thuong cong san chan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu quang) OR (chat quang)) - ((nhanh bac) or (nhanh ba)) cua thuong cong san chan ban*.