Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
ban thai » ban than, ban thi, ban tai
xuc van » duc van, luc van, vuc van
hau xuc » chat xuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach kem
nang co » nang cao, nang doc, nang noi
va hau » van hau, va chau, vat hau
nang o » nang ho, nang ro, nang x
sac ky » cac ky, sai ky

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 (sac ky)) ((nang o) OR (nang co)) hai. hieu va hau xuc van ban thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) ((nang o) OR (nang co)) hai. hieu va hau xuc van ban thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) ((nang o) OR (nang co)) hai. hieu va hau xuc van ban thai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) ((nang o) OR (nang co)) hai. hieu va hau xuc van ban thai cua tre*.