Perhaps you should try some spelling variations:
trinh thanh » tinh thanh, trinh han, dinh thanh
chieu sach » chinh sach, chiet tach, chieu sang
thuong qua » thong qua, thuong quang, truong quan
thuong quy » nhung quy, thong qua, thong que
nhung cong » dung cong, thong cong, hang cong
trinh toan » tinh toan, thanh toan, trinh han
ho chieu » theo chieu, hoc thieu, doi chieu

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

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