Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
va truong » van truong, xa truong, va thuong
chi sach » chinh sach, chieu sach, co sach
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
doi chi » doi khi
sinh va » sinh vat, tinh va, dinh van
con dan » cong dan, con ban, con day
co dan » co ban, ca dan, cao dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - hanh sinh va truong ((con dan) or (co dan)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - hanh sinh va truong ((con dan) OR (co dan)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chi sach - hanh sinh va truong ((con dan) or (co dan)) ((toan cau) or (toan ban))*.