Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
cua tre » cua te, cuu tre, cua triet
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
xac va » tac va, ac va, bac va
y lang » o lang, _ lang, tay lang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y lang xa hoi. hieu ve chat ((xac va) or (tuc va)) ((danh vi) or (dinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang xa hoi. hieu ve chat ((xac va) OR (tuc va)) ((danh vi) OR (dinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y lang xa hoi. hieu ve chat ((xac va) or (tuc va)) ((danh vi) or (dinh vi)) cua tre*.