Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
van anh » van thanh, tuan anh
noi cua » hoi cua, doi cua, moi cua
cua cau » cua cac, cua chu, cua cay
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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) OR (thuoc sach)) y nang cao hoc. hieu ve 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) OR (thuoc sach)) y nang cao hoc. hieu ve 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) OR (thuoc sach)) y nang cao hoc. hieu ve cac xuc ((van anh) or (van minh)) noi cua cau*".