Perhaps you should try some spelling variations:
nhung hoang » khung hoang, phuong hoang, nhung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hoang van » hang va
sinh cua » manh cua, dinh cuu, sinh va
tan cau » toan cau, tan ca, tao cau
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh ((sinh cua) or (tinh chat)) nhung hoang van ((tan cau) OR (van cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((sinh cua) OR (tinh chat)) nhung hoang van ((tan cau) OR (van cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((sinh cua) or (tinh chat)) nhung hoang van ((tan cau) OR (van cau))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((sinh cua) or (tinh chat)) nhung hoang van ((tan cau) OR (van cau))*.