Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
dang mam » dang nam, dang mau, dang mat
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
cac loc » cac lop, cac toc, cac hoc
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va
dang ma » dang mau, dang mat, tang ma
loc va » hoc va, luc 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 ty ((dang ma) or (dang mam)) hoi. ((hieu ve) OR (hieu van)) cac loc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((dang ma) OR (dang mam)) hoi. ((hieu ve) OR (hieu van)) cac loc va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((dang ma) or (dang mam)) hoi. ((hieu ve) OR (hieu van)) cac loc va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((dang ma) or (dang mam)) hoi. ((hieu ve) OR (hieu van)) cac loc va thanh vai cua tre*.