Perhaps you should try some spelling variations:
van vanh » van anh, van hanh, van manh
vanh dai » van dai, vanh tai, lanh dao
duc van » duc va, duc tan, duc manh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cam) or (ve cac)) duc van vanh dai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x hoi. hieu ((ve cam) OR (ve cac)) duc van vanh dai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang x hoi. hieu ((ve cam) or (ve cac)) duc van vanh dai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x hoi. hieu ((ve cam) or (ve cac)) duc van vanh dai ((cua te) OR (cua tu))*.