Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
thanh tung » thanh cong
tung tuan » trung tuan, hung tuan, quang tuan
tuan tong » toan tong, thuan trong, toan thong
tong cong » trong cong, cong cong, dung cong
san than » sang than, san thanh, ban than
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) OR (thieu khang)) - thanh tung tuan tong cong ((san than) or (ban hang)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh tung tuan tong cong ((san than) OR (ban hang)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - thanh tung tuan tong cong ((san than) or (ban hang)) cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - thanh tung tuan tong cong ((san than) or (ban hang)) cap*.