Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nano cuo » nan cua, nang cua, nano cau
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
sach tu » sach thu, cach tu, sach ty
cua cau » cua cac, cua chu, cua can
cua cay » cua cac
cac xuc » cam xuc, cac nuoc, cac cuoc
hieu ve » hieu va, hieu van
cuo hoc » co hoc, cho hoc, cao hoc
tu nano » truc nano

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 tu nano cuo hoc. hieu ve ((cac xuc) or (chat xuc)) van hanh vi ((cua cau) OR (cua cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nano cuo hoc. hieu ve ((cac xuc) OR (chat xuc)) van hanh vi ((cua cau) OR (cua cay))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nano cuo hoc. hieu ve ((cac xuc) or (chat xuc)) van hanh vi ((cua cau) OR (cua cay))*".