Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
bo sach » co sach, hoc sach
dang xa » dang xay, dang ha, dang va
lang xa » lang ha, dang xay, lang van
hieu vi » hieu voi, hieu va, hieu ve
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua
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) OR (lang xa)) hoi. hieu vi pham duc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (bo sach)) ky ((dang xa) OR (lang xa)) hoi. hieu vi pham duc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (bo sach)) ky ((dang xa) OR (lang xa)) hoi. hieu vi pham duc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (bo sach)) ky ((dang xa) OR (lang xa)) hoi. hieu vi pham duc va danh vi cua te*.