Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
qua hai » qua hoat
hai xuc » hai cuc, hai xu, chat xuc
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao

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 ((dang xay) or (lang ha)) hoi. hieu qua hai xuc ((va dan) OR (ca dan)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((dang xay) OR (lang ha)) hoi. hieu qua hai xuc ((va dan) OR (ca dan)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((dang xay) or (lang ha)) hoi. hieu qua hai xuc ((va dan) OR (ca dan)) vai cua tre*".