Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thang qua » thong qua, thang cua, thang mua
dung cong » dung trong
chi sach » chinh sach, chieu sach, co sach
qua dung » quang dung, su dung, qua song
cong san » cong tac
toan cao » toan tap
toan ban » van ban
doi chi » doi khi

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 - thanh thang qua dung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - thanh thang qua dung cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chi sach - thanh thang qua dung cong san ((toan cao) or (toan ban))*.