Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cac tuc » cac toc, cac tu, cac tac
xa hanh » xa thanh, xa khanh, va hanh
luy tre » luyen tre
vi luy » vi lua, vi luu
x hoi » xa hoi, x ho, 5 hoi
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) or (su sach)) ky nang ((x hoi) or (o hoi)). hieu vien cac tuc xa hanh vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((x hoi) OR (o hoi)). hieu vien cac tuc xa hanh vi luy tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((x hoi) or (o hoi)). hieu vien cac tuc xa hanh vi luy tre*.