Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
thanh doi » thanh loi, thanh moi, thanh do
thu thanh » thu thang, tu thanh, thuan thanh
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve am) OR (va am)) thu thanh thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (tang ma)) hoi. hieu ((ve am) OR (va am)) thu thanh thanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve am) OR (va am)) thu thanh thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve am) OR (va am)) thu thanh thanh doi cua tre*.