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
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
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 tan) 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 tan) OR (truong thanh))) OR (cong trinh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua nhung ((((cong tan) or (truong thanh))) or (cong trinh)) toan ban*.