Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
doi cua » dai cua, hoi cua
xuc van » duc van, luc van, vuc van
va chat » van chat, va phat, cao chat
ky lang » ky nang, ky dang, ky tang
san ky » sang ky, van ky, dan ky
ha hoi » hoa hoi, ha noi, va hoi
di cua » dai cua, de cua, do cua
tu san » thu san, tu ban, tu can

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: tu san ky lang ((ha hoi) OR (xa hoi)). lieu va chat xuc van hanh ((di cua) OR (doi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang ((ha hoi) or (xa hoi)). lieu va chat xuc van hanh ((di cua) OR (doi cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu san ky lang ((ha hoi) or (xa hoi)). lieu va chat xuc van hanh ((di cua) OR (doi cua)) triet*.