Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
thanh hai » thanh phan, thanh hoa, thanh san
va trien » va truyen, va thiet, va tuyen
nam thuc » nam thuoc, am thuc, nam thu
va triet » va thiet, ve triet, cua triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) nam thuc vat thanh hai ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. ((hieu ve) or (hieu va)) nam thuc vat thanh hai ((va triet) OR (va trien))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. ((hieu ve) or (hieu va)) nam thuc vat thanh hai ((va triet) OR (va trien))*.