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

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) OR (o lai)). hieu ((ve cam) or (ve 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) OR (o lai)). hieu ((ve cam) OR (ve 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) OR (o lai)). hieu ((ve cam) or (ve cac)) duc va hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((o hai) OR (o lai)). hieu ((ve cam) or (ve cac)) duc va hanh dai cua te*.