Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
nang xa » lang xa, nang ma, mang xa
van bao » van ban, van dao
bao duc » dao duc, bao luc, cao duc
va hanh » van hanh, va thanh, va danh
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 khach ty ((nang xa) or (nang x)) hoi. hieu van bao duc va hanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty ((nang xa) OR (nang x)) hoi. hieu van bao duc va hanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: vu khach ty ((nang xa) or (nang x)) hoi. hieu van bao duc va hanh than cua tre*.