Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
cac luc » cau luc, coc luc, cac nuoc
va xanh » va danh, va hanh, va anh
xanh di » danh di, vanh dai, xanh tai
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
te sac » te sach, te cac, te san
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ((x hoi) or (o hoi)). hieu vien cac luc va xanh di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ((x hoi) OR (o hoi)). hieu vien cac luc va xanh di ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ((x hoi) or (o hoi)). hieu vien cac luc va xanh di ((cua tre) or (cua triet))*.