Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
mai khoi » mai khoa, tai khoa, cac khoi
minh vai » minh va, minh hai, minh ai
vien dai » hien dai
cau tren » cu tren, dau tren, ca tren
nang mai » nang ma, nang tai, lang mai
sach ty » sach y, sach tu, sach thu
sach ly » sach y, sach lo, sach hay
dai xuc » dai xu, dai luoc, dai thuc
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau treo

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