Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
cham tuc » nham thuc, pham thuc, tham thuc
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
nang ma » tang ma, sang ma, mang may
cua tre » cua te, cuu tre, cua triet
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: so sach ty ((nang ma) OR (nang cao)) hoi. lieu va cham tuc va ((thanh ve) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang ma) OR (nang cao)) hoi. lieu va cham tuc va ((thanh ve) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang ma) OR (nang cao)) hoi. lieu va cham tuc va ((thanh ve) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang ma) OR (nang cao)) hoi. lieu va cham tuc va ((thanh ve) or (hanh vi)) cua tre*.