Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
trinh quan » tinh quang, trinh luat, trinh han
trinh cong » trinh dung
hoc thieu » toc thieu, hoc hien
trinh qua » trinh cua, trinh quang, trinh luat
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - canh ((trinh qua) OR (trinh quan)) trinh cong dan hang va~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - canh ((trinh qua) OR (trinh quan)) trinh cong dan hang va*.