Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
canh tac » canh tay, canh giac, cong tac
thanh va » thanh van, hanh va, thanh ha
canh xa » canh va, canh tay, manh xay
cuu tre » cua tre, cau tren, cau treo
va pham » van pham, va phat, va phap
duc ban » duc tan, duc van, dua ban
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((canh xa) OR (canh tac)) hoi. lieu va pham duc ban thanh va ((cuu tre) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((canh xa) OR (canh tac)) hoi. lieu va pham duc ban thanh va ((cuu tre) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((canh xa) OR (canh tac)) hoi. lieu va pham duc ban thanh va ((cuu tre) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((canh xa) OR (canh tac)) hoi. lieu va pham duc ban thanh va ((cuu tre) or (cua su))*.