Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh moi » thanh loi, thanh hoa, thanh tai
va trien » va truyen, va thiet, va tuyen
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
te san » te ban, ke san, tu san
thu va » thuc va, thue va, tu va
san ky » sang ky, van ky, dan ky
ha hoi » hoa hoi, ha noi, va hoi
va nam » van nam, ha nam, va nay

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