Perhaps you should try some spelling variations:
toc cach » hoc cach, toc sach, truoc cach
tuc tang » thuc trang, duc thang, duc tan
hanh di » hanh de, hang di, danh di
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu tang » tu trang, tu tong, tu lang
cua cau » cua cac, cua chu, cua cay
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 cach ((tu tang) OR (tuc tang)) cho hoc. hieu ve cac xuc van ((hanh di) or (hanh vi)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach ((tu tang) OR (tuc tang)) cho hoc. hieu ve cac xuc van ((hanh di) OR (hanh vi)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc cach ((tu tang) OR (tuc tang)) cho hoc. hieu ve cac xuc van ((hanh di) or (hanh vi)) cua cau*".