Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
thanh than » thanh thanh, thanh thang, thanh toan
hieu van » hieu va, thien van, lieu va
duc manh » suc manh, duc anh, duc minh
than cua » nhan cua, thai cua, ban cua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
van bao » van ban, van dao
bao duc » dao duc, bao luc, cao duc
cua tre » cua te, cuu tre, cua triet
su sai » su hai, su dai, su mai
su tai » su thi, tu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) or (su tai)) ky lang xa hoi. hieu van bao duc manh thanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su tai)) ky lang xa hoi. hieu van bao duc manh thanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su tai)) ky lang xa hoi. hieu van bao duc manh thanh than cua tre*.