Perhaps you should try some spelling variations:
chieu lang » chieu sang, hieu lang, chi lang
doi chieu » doc hieu, doi chi, ho chieu
dang cong » dung cong
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: doi chieu lang - hanh ((trinh va) OR (trinh ve)) dang cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu lang - hanh ((trinh va) OR (trinh ve)) dang cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu lang - hanh ((trinh va) OR (trinh ve)) dang cong dan toan cau*.