Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chau tinh » cuu tinh, ha tinh, cua tinh
nhung cau » chung cu, nhung bai, nhu cau
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ho chau » ha chau, ho chu, o chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chau tinh - hanh trinh va ((nhung cau) or (dung cong)) tan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chau tinh - hanh trinh va ((nhung cau) OR (dung cong)) tan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chau tinh - hanh trinh va ((nhung cau) or (dung cong)) tan ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho chau tinh - hanh trinh va ((nhung cau) or (dung cong)) tan ((toan cau) OR (toan ban))*.