Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chieu sach » chinh sach, chiet tach, chieu sang
trinh vat » trinh van, trinh luat, trinh han
duong van » duong va, luong va, dang van
ho chieu » theo chieu, hoc thieu, doi chieu
dong cao » duong cao, dong co, dong cho

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 - hanh ((trinh vat) OR (sinh vat)) nhung duong van dong cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh vat) OR (sinh vat)) nhung duong van dong cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh vat) OR (sinh vat)) nhung duong van dong cao*.