Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
bo sach » co sach, hoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu vi » hieu voi, hieu va, hieu ve
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
cua te » cua tu
pham » phan

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) or (bo sach)) ky dang xa hoi. hieu vi pham duc va ((danh vi) OR (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (bo sach)) ky dang xa hoi. hieu vi pham duc va ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (bo sach)) ky dang xa hoi. hieu vi pham duc va ((danh vi) OR (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (bo sach)) ky dang xa hoi. hieu vi pham duc va ((danh vi) OR (dinh vi)) cua te*.