Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong tan
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
toan ban » van 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 - hanh tranh cua nhung ((((cong thanh) OR (truong thanh))) or (cong trinh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tranh cua nhung ((((cong thanh) OR (truong thanh))) OR (cong trinh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh tranh cua nhung ((((cong thanh) OR (truong thanh))) or (cong trinh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua nhung ((((cong thanh) OR (truong thanh))) or (cong trinh)) toan ban*.