Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
vu sach » vu bach, su sach, vu khach
ky danh » ky anh
ky dang » ky nang
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky danh) or (ky dang)) xay hoi. hieu ve cac loc ((va thanh) OR (ban thanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky danh) OR (ky dang)) xay hoi. hieu ve cac loc ((va thanh) OR (ban thanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky danh) or (ky dang)) xay hoi. hieu ve cac loc ((va thanh) OR (ban thanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky danh) or (ky dang)) xay hoi. hieu ve cac loc ((va thanh) OR (ban thanh)) di cua te*.