Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
chua hang » cua hang, chua nang, chua xang
hang cong » dang cong, hang nong, bang cong
chi sach » chinh sach, chieu sach, co sach
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - hanh trinh chua hang cong ((dan than) OR (dan chan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - hanh trinh chua hang cong ((dan than) OR (dan chan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - hanh trinh chua hang cong ((dan than) OR (dan chan)) cao*.