Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
co thuc » co thua, mo thuc, so thuc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
do thuc » hoc thuc, dan thuc
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
nang xa » lang xa, nang ma, mang xa

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 tu ((nang xa) or (nang x)) hoi. lieu va ((co thuc) OR (do thuc)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((nang xa) OR (nang x)) hoi. lieu va ((co thuc) OR (do thuc)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((nang xa) or (nang x)) hoi. lieu va ((co thuc) OR (do thuc)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((nang xa) or (nang x)) hoi. lieu va ((co thuc) OR (do thuc)) va hanh vai cua tre*.