Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
vien da » vien dai, hien dai
luu tre » luu tru, luy tre
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
cuu tre » cua tre, cau tren, cau treo
da ky » dan ky, dai ky, dia ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vien da ky ((nang xa) or (tang ma)) hoi. hieu va chat xuc van hanh vi ((luu tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vien da ky ((nang xa) OR (tang ma)) hoi. hieu va chat xuc van hanh vi ((luu tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vien da ky ((nang xa) or (tang ma)) hoi. hieu va chat xuc van hanh vi ((luu tre) or (cuu tre))*.