Perhaps you should try some spelling variations:
hieu sang » chieu sang, hieu lang, hieu quang
cong chuc » cong thuc, cong cu, cong cua
chuc dung » thuc dung, thuoc dung, chuc nang
dung cong » dung trong
tan chinh » tai chinh, lan chinh, van chinh
chinh cau » chinh chau, chinh ca, chinh can
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - thanh cong chuc dung cong tan chinh cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh cong chuc dung cong tan chinh cau*.