Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
ban hanh » ban hang
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
tu sac » tu cac, tu san, tu bac
ve cam » ve cham, ve cac, va cam
cua cu » cua chu, cua cau, cua su
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 sac) OR (tu sach)) ky nang ((x hoi) or (o hoi)). hieu ve cam duc ban hanh tri cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang ((x hoi) OR (o hoi)). hieu ve cam duc ban hanh tri cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang ((x hoi) or (o hoi)). hieu ve cam duc ban hanh tri cua cu".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang ((x hoi) or (o hoi)). hieu ve cam duc ban hanh tri cua cu*.