Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
minh vai » minh va, minh hai, minh ai
vien dai » hien dai
vai cuu » vai cua
xuc van » duc van, luc van, vuc van
te sach » toc sach
sach ly » sach y, sach lo, sach ty
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((mai hoi) OR (dai hoi)). hieu vien dai ((xuc van) OR (duc tan)) minh vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ((mai hoi) OR (dai hoi)). hieu vien dai ((xuc van) or (duc tan)) minh vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((mai hoi) OR (dai hoi)). hieu vien dai ((xuc van) or (duc tan)) minh vai cuu tre*.