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 bang » chua bang, cua ban, cua dang
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

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 bang ((truong thanh) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tranh cua bang ((truong thanh) OR (cong tan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua bang ((truong thanh) or (cong tan)) toan cau*.