Perhaps you should try some spelling variations:
trinh thanh » tinh thanh, trinh han, trinh toan
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
thong qua » thong cua, thong tu, duong qua
thanh cau » thanh chau, thanh mau, nhanh cau
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 ((thong qua) OR (thong quan)) nhung cong trinh thanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((thong qua) OR (thong quan)) nhung cong trinh thanh cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((thong qua) OR (thong quan)) nhung cong trinh thanh cau*.