Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham xu » chao xu, cham cuu, chat xuc
xu van » tu van, vu van, su van
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: so sach ty nang ((x hoi) OR (o hoi)). hieu ve cham xu van hanh tri cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang ((x hoi) OR (o hoi)). hieu ve cham xu van hanh tri cua viet".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((x hoi) OR (o hoi)). hieu ve cham xu van hanh tri cua viet*.