Perhaps you should try some spelling variations:
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
va trien » va truyen, va thiet, va tuyen
doc sac » doc sach, dac sac, hoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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: doc sac ky nang xa hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ((cua tre) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sac ky nang xa hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ((cua tre) or (va trien))~".
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang xa hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ((cua tre) or (va trien))*.