Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
vien cac » vien bach, vien dai, vien da
va hanh » van hanh, va thanh, va danh
tu san » thu san, tu ban, tu can
cua te » cua tu
ve cac » va cac
san ky » sang ky, van ky, dan ky
ve cam » ve cham, va cam, ve cai
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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

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