Perhaps you should try some spelling variations:
dong thanh » truong thanh
hanh tang » hanh trang, anh tang, hanh mang
theo chu » theo chieu, cho chu, chao chu
chu nang » chuc nang, chua nang, cuu nang
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang va

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 nang - hanh tang va nhung ((cong trinh) or (dong thanh)) ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu nang - hanh tang va nhung ((cong trinh) OR (dong thanh)) ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo chu nang - hanh tang va nhung ((cong trinh) or (dong thanh)) ((toan cau) or (toan cao))*.