Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
vien cac » vien bach, vien dai, vien da
thu nang » thu hang, thu bang, tho nang
thuc van » thuc vat, thuc dan, thuc va
thi nang » thi cong, ki nang, thi hanh
cac thuc » cach thuc, cac thu, can thuc
van anh » van thanh, tuan anh, van minh
te sach » toc sach
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 ((thu nang) OR (thi nang)) cho hoc. hieu vien cac thuc van anh ((vi cua) or (dai cua)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thi nang)) cho hoc. hieu vien cac thuc van anh ((vi cua) OR (dai cua)) cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu nang) OR (thi nang)) cho hoc. hieu vien cac thuc van anh ((vi cua) or (dai cua)) cac*".