Perhaps you should try some spelling variations:
thieu khang » chieu khong
thieu quang » hieu quang, thien quan, trien quang
cua truong » cua trung, xuan truong, cac truong
cua trong » cua trung, qua trong, ca trong
cong dan » cong san, cong tan, huong dan
dan hang » ban hang, van hang, dat 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 khang) OR (thieu quang)) - canh tranh ((cua trong) or (cua truong)) cong dan hang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (thieu quang)) - canh tranh ((cua trong) OR (cua truong)) cong dan hang va.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) OR (thieu quang)) - canh tranh ((cua trong) or (cua truong)) cong dan hang va".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) OR (thieu quang)) - canh tranh ((cua trong) or (cua truong)) cong dan hang va*.