Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
cua truong » cua trung, xuan truong, cac truong
hoc thieu » toc thieu, hoc hien
cong ban » cong bang, cong tan, cong dan
cong san » cong tac

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 - ((hanh tranh) OR (hanh trinh)) cua truong ((cong ban) or (cong san)) hang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh tranh) OR (hanh trinh)) cua truong ((cong ban) OR (cong san)) hang va.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh tranh) OR (hanh trinh)) cua truong ((cong ban) or (cong san)) hang va".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh tranh) OR (hanh trinh)) cua truong ((cong ban) or (cong san)) hang va*.