Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham cuc » cham cuu, pham cuc, pham chuc
ban tinh » quan tinh, ban hanh, bi tinh
dong hoc » dong co, dong luc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di 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 ty ((dang xa) or (dong hoc)) hoi. hieu ve cham cuc ((ban tinh) OR (ban thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((dang xa) OR (dong hoc)) hoi. hieu ve cham cuc ((ban tinh) OR (ban thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((dang xa) or (dong hoc)) hoi. hieu ve cham cuc ((ban tinh) OR (ban thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((dang xa) or (dong hoc)) hoi. hieu ve cham cuc ((ban tinh) OR (ban thanh)) vi cua tre*.