Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
trinh cua » tinh cua, trinh luat, trinh quan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (doi chieu)) sach - hanh trinh cua ((nhung cong) OR (thong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (doi chieu)) sach - hanh trinh cua ((nhung cong) OR (thong cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (doi chieu)) sach - hanh trinh cua ((nhung cong) OR (thong cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (doi chieu)) sach - hanh trinh cua ((nhung cong) OR (thong cong)) dan toan cao*.