Perhaps you should try some spelling variations:
trinh luan » trinh quan, trinh han, trinh toan
nhung cong » dung cong, thong cong, hang cong
chu tinh » chau tinh, chua tinh, cuu tinh
cong san » cong tac
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu
ho chu » hoi chu, cho chu, ho chua

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

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