Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thong cong » tong cong, thong thong, phong chong
van tao » van thao, vang tao, van tai
tao cao » bao cao, toan cao
tinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((diep tinh) or (chieu sach)) - hanh trinh quan ((thong cong) or (trong cong)) van tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((diep tinh) OR (chieu sach)) - hanh trinh quan ((thong cong) OR (trong cong)) van tao cao.
• Adding a wildcard symbol may retrieve word variants: ho ((diep tinh) or (chieu sach)) - hanh trinh quan ((thong cong) or (trong cong)) van tao cao*.