Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
hanh nam » thanh nam, hanh lam, hanh ngay
vu sach » vu bach, su sach, vu khach
ty mang » ty hang, tin mang, tri mang
may hoi » may thoi, tay hoi, mai hoi
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ty mang) or (ty xang)) may hoi. hieu vu cham duc van hanh nam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty mang) OR (ty xang)) may hoi. hieu vu cham duc van hanh nam cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty mang) or (ty xang)) may hoi. hieu vu cham duc van hanh nam cua tre*.