Perhaps you should try some spelling variations:
thanh moi » thanh loi, thanh hoa, thanh hai
va triet » va thiet, va trien, ve triet
thuoc ma » hoc ma, duoc ma
thuoc va » thuc va, thuong va, thuoc tai
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
moi va » hoi va, mai va, moi ve
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
ha hoi » hoa hoi, ha noi, xa hoi
va nha » va nho, ve nha

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky lang ((ha hoi) or (hoa hoc)). hieu va nha ((thuoc va) OR (thuoc ma)) thanh moi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky lang ((ha hoi) OR (hoa hoc)). hieu va nha ((thuoc va) OR (thuoc ma)) thanh moi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky lang ((ha hoi) or (hoa hoc)). hieu va nha ((thuoc va) OR (thuoc ma)) thanh moi va triet".
• Adding a wildcard symbol may retrieve word variants: te san ky lang ((ha hoi) or (hoa hoc)). hieu va nha ((thuoc va) OR (thuoc ma)) thanh moi va triet*.