Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ra, nang rong
nang ho » nang hoc, nang co, tang ho
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang ro) OR (nang ho)) hoi. lieu va chat ((duc gia) or (quoc gia)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ro) OR (nang ho)) hoi. lieu va chat ((duc gia) OR (quoc gia)) thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang ro) OR (nang ho)) hoi. lieu va chat ((duc gia) or (quoc gia)) thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ro) OR (nang ho)) hoi. lieu va chat ((duc gia) or (quoc gia)) thanh vi cua tre*.