Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, hieu ve
va triet » va trien, ve triet, cua triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
bac tuc » bac tu, bach tuoc, bac thua
tuc ban » thuc ban, truc ban, tu ban
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac tuc ban thanh lap ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac tuc ban thanh lap ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac tuc ban thanh lap ((va triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac tuc ban thanh lap ((va triet) or (va thiet))*.