Perhaps you should try some spelling variations:
van phan » van phong, van thanh, luan phan
phan duc » pham duc, phan tu, phan dau
su triet » su tien, ve triet
thanh do » thanh de, thanh pho, thanh hoa
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) ky nang xa hoi. hieu van phan duc va thanh do ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang xa hoi. hieu van phan duc va thanh do ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky nang xa hoi. hieu van phan duc va thanh do ((su triet) OR (su viet))*".