Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cau tuc » cau truc, cau tu, cau luc
tuc van » thuc van, truc van, tuc va
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
vi luu » vi lua
x hoi » xa hoi, o hoi, 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: su sach y nang ((x hoi) or (x ho)). lieu va cau tuc van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((x hoi) OR (x ho)). lieu va cau tuc van hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((x hoi) or (x ho)). lieu va cau tuc van hanh vi luu tre*.