Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
dang xay » dang van, van xay
te sach » toc sach
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((lang xa) or (dang xay)) hoi. hieu va chat ((xuc va) OR (luc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((lang xa) OR (dang xay)) hoi. hieu va chat ((xuc va) OR (luc va)) hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((lang xa) or (dang xay)) hoi. hieu va chat ((xuc va) OR (luc va)) hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((lang xa) or (dang xay)) hoi. hieu va chat ((xuc va) OR (luc va)) hanh dai cua tre*.