Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va trien » va truyen, va thiet, va tuyen
toc sac » toc sach, toc san, hoc sach
duc van » duc va, duc tan, duc manh
sac ky » cac ky, sai ky
ve 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang x hoi. hieu ((va cac) OR (ve cac)) duc van hanh vi ((cua tu) OR (va trien))~.
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang x hoi. hieu ((va cac) or (ve cac)) duc van hanh vi ((cua tu) or (va trien))*.