Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
thai cua » than cua, tai cuc, tri cua
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
co loi » co hoi
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ((o hoi) or (co loi)). hieu vien cac ((luc van) OR (luu van)) hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((o hoi) OR (co loi)). hieu vien cac ((luc van) OR (luu van)) hanh thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((o hoi) or (co loi)). hieu vien cac ((luc van) OR (luu van)) hanh thai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((o hoi) or (co loi)). hieu vien cac ((luc van) OR (luu van)) hanh thai cua te*.