Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hanh tang » hanh trang, anh tang, hanh mang
dang cong » dung cong
chu sang » thu sang, chieu sang, chuc nang
chu bang » thu bang, chuc nang, chu quang
toan cao » toan tap
toan ban » van ban
tang va » trang va, tang van, thang va
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sang) OR (chu bang)) - hanh tang va dang cong thanh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chu bang)) - hanh tang va dang cong thanh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sang) OR (chu bang)) - hanh tang va dang cong thanh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) OR (chu bang)) - hanh tang va dang cong thanh ((toan cao) or (toan ban))*.