Perhaps you should try some spelling variations:
thieu khang » chieu khong
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thuong cong » thong cong, thuong con, thuong dong
cap thuong » chap thuong, ca thuong, cao thuong
trung cap » truong cao, trung tam
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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 khang) or (thieu quang)) - thanh trung cap thuong cong ((dan toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (thieu quang)) - thanh trung cap thuong cong ((dan toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (thieu quang)) - thanh trung cap thuong cong ((dan toan) OR (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (thieu quang)) - thanh trung cap thuong cong ((dan toan) OR (manh toan)) cau*.