Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi cua
can ky » van ky, dan ky, tan ky
ban ky » van ky, dan ky
di cua » dai cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

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 ((can ky) OR (ban ky)) nang x hoi. hieu qua cam xuc van hanh ((di cua) OR (doi cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((can ky) OR (ban ky)) nang x hoi. hieu qua cam xuc van hanh ((di cua) or (doi cua)) te~".
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) OR (ban ky)) nang x hoi. hieu qua cam xuc van hanh ((di cua) or (doi cua)) te*.