Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
dan chan » dan gian, dan ca, van chat
chan cho » chat cho, han cho, chuan chon

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 xanh - hanh trinh chua ((dang cong) or (dung cong)) dan chan cho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trinh chua ((dang cong) OR (dung cong)) dan chan cho.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trinh chua ((dang cong) or (dung cong)) dan chan cho*.