Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh ((trung thanh) or (truong thanh)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((trung thanh) OR (truong thanh)) dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((trung thanh) or (truong thanh)) dung cong tan toan cau*.