Perhaps you should try some spelling variations:
sanh thanh » danh thanh, anh thanh, san thanh
can thanh » ban thanh, van thanh, cac thanh
thanh hoa » thanh pho
cong khi » cong thai, khong khi, co khi
so sanh » do sanh
su can » su van, su cao, tu can
hoa hi » hoa phi, hoa hoi, hoa thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh thanh cong khi đong luc ) or ( su can thanh hoa hi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh thanh cong khi đong luc ) OR ( su can thanh hoa hi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh thanh cong khi đong luc ) or ( su can thanh hoa hi đong luc ))*.