Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung dai » truong dai, truong dao, trung tam
dai nhung » ai nhung, dai khung, dap nhung
cong san » cong tac
toan cao » toan tap
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: theo hieu lang - hanh trung dai nhung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh trung dai nhung cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh trung dai nhung cong san ((toan cao) or (toan ban))*.