Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
su sach » vu sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
ca viet » va viet, co viet, hoa viet
xu van » vu van, su van
tu van » tu va
tri ca » tri cua, tri cac, tri va
x hoi » xa hoi, o hoi, x ho

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) or (so sach)) ty nang x hoi. hieu ve cham ((xu van) OR (tu van)) hanh tri ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty nang x hoi. hieu ve cham ((xu van) OR (tu van)) hanh tri ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ty nang x hoi. hieu ve cham ((xu van) OR (tu van)) hanh tri ca viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty nang x hoi. hieu ve cham ((xu van) OR (tu van)) hanh tri ca viet*.