Perhaps you should try some spelling variations:
va triet » va trien, ve triet, cua triet
hieu van » hieu va, thien van, lieu va
van chat » cao chat
so sach » so sanh, bo sach, co sach
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (cuc ban)) hanh kem ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (cuc ban)) hanh kem ((va triet) OR (va thiet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (cuc ban)) hanh kem ((va triet) or (va thiet))*".