Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
chat duc » chat xuc, chat doc, chet duoc
vai cua » dai cua, hai cua, lai cua
dao vai » dao van, dao va, dao bai
te sach » toc sach
sach vu » sach va, sach tu, sach uu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
va dao » 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: te sach vu ((nang xa) or (nang ma)) hoi. ((hieu van) OR (thien van)) chat duc va dao vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu ((nang xa) OR (nang ma)) hoi. ((hieu van) OR (thien van)) chat duc va dao vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu ((nang xa) or (nang ma)) hoi. ((hieu van) OR (thien van)) chat duc va dao vai cua tre*".