Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
ho chiet » ho chieu, ho thiet, hoc thiet
gian nan » gian dan, gian lan, gian van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - hanh trinh cua ((dung cong) or (hang cong)) dan gian nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh cua ((dung cong) OR (hang cong)) dan gian nan.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh cua ((dung cong) or (hang cong)) dan gian nan*.