Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
manh trung » manh tung, manh hung, sinh trung
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
can ban » van ban, toan ban
ca ban » cua ban, cac ban, co ban

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