Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
pham duy » pham duc
thanh ca » thanh cha, thanh cac, thanh ha
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky dang » ky danh
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky nang) or (ky dang)) hoa hoi. hieu ve ((cham soc) or (pham duy)) ban thanh ca cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky nang) OR (ky dang)) hoa hoi. hieu ve ((cham soc) OR (pham duy)) ban thanh ca cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky nang) or (ky dang)) hoa hoi. hieu ve ((cham soc) or (pham duy)) ban thanh ca cua viet*.