Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
vien cac » vien bach, vien dai, vien da
toc sach » hoc sach, doc sach, thuoc sach
xang cho » sang cho, hang cho, tang cho
cac xuc » cam xuc, cac nuoc, chat xuc
hai cua » thai cua, dai cua, hoi cua
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
cho hoc » co hoc, khoa hoc
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: ((te sach) OR (toc sach)) ty xang cho hoc. hieu vien cac xuc van anh ((vi cua) or (hai cua)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty xang cho hoc. hieu vien cac xuc van anh ((vi cua) OR (hai cua)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty xang cho hoc. hieu vien cac xuc van anh ((vi cua) or (hai cua)) cau*".