Perhaps you should try some spelling variations:
toc cach » hoc cach, toc sach, truoc cach
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
thu hang » thi hang, thuc hanh, thu huong
cho hoc » co hoc, khoa hoc
cac xuc » cac nuoc, chat xuc, cac cuoc
tu hang » tu hanh, tu hung, ty hang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc cach ((tu hang) OR (thu hang)) cho hoc. hieu van ((cac xuc) or (cam xuc)) van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach ((tu hang) OR (thu hang)) cho hoc. hieu van ((cac xuc) OR (cam xuc)) van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc cach ((tu hang) OR (thu hang)) cho hoc. hieu van ((cac xuc) or (cam xuc)) van hanh vi cua cau*".