Perhaps you should try some spelling variations:
sinh thai » dinh thi
nhanh thi » nhanh thai, nhanh thuc, nhan tai
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
nang so » nang som, nang co, nang ho
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
so hai » son hai, su hai, so ha

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) or (sach y)) nang so hai. hieu ve cam xuc van ((nhanh thi) or (sinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang so hai. hieu ve cam xuc van ((nhanh thi) OR (sinh thai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang so hai. hieu ve cam xuc van ((nhanh thi) or (sinh thai)) cua tre*.