Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (vu khach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cam xuc van hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (vu khach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cam xuc van hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (vu khach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cam xuc van hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (vu khach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cam xuc van hanh dai cua tre*.