Perhaps you should try some spelling variations:
thieu hanh » thien thanh, thien chanh, thieu khang
truong cao » truong dai
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: toc thieu hanh - thanh ((trung cua) or (truong cao)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hanh - thanh ((trung cua) OR (truong cao)) dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu hanh - thanh ((trung cua) or (truong cao)) dung cong tan toan cau*.