Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang cho » nang chon, ngang cho, nang cao
cho hoc » co hoc, khoa hoc
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
cac xuc » cam xuc, cac nuoc, chat xuc
van anh » van thanh, tuan anh
ty nang » ky nang, ty xang, ty hang
noi cua » hoi cua, doi cua, moi cua
cua cau » cua cac, cua chu, cua cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang cho hoc. ((hieu ve) OR (hieu van)) cac xuc ((van anh) or (van minh)) noi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cho hoc. ((hieu ve) OR (hieu van)) cac xuc ((van anh) OR (van minh)) noi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang cho hoc. ((hieu ve) OR (hieu van)) cac xuc ((van anh) or (van minh)) noi cua cau*".