Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
toc sach » hoc sach, doc sach, thuoc sach
nano cho » nang cho, nano cuo, nang chon
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
vien da » vien dai, hien dai
cho hoc » co hoc, khoa hoc
tu nano » truc nano
va cua » va chua, via cua, ma cua
ca cua » co 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)) tu nano cho hoc. hieu vien da xuc van anh ((va cua) OR (ca cua)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu nano cho hoc. hieu vien da xuc van anh ((va cua) OR (ca cua)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) tu nano cho hoc. hieu vien da xuc van anh ((va cua) OR (ca cua)) cau*".