Perhaps you should try some spelling variations:
vu khanh » vu thanh, van khanh, duy khanh
vu sach » su sach, vu khach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
di cua » dai cua, doi cua, de cua
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: ((((vu sach) or (vu bach))) or (vu khanh)) ky nang x hoi. hieu ve cam tu va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu sach) OR (vu bach))) OR (vu khanh)) ky nang x hoi. hieu ve cam tu va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu sach) or (vu bach))) or (vu khanh)) ky nang x hoi. hieu ve cam tu va hanh di cua tre*.