Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
su tai » su thi, tu tai
tai ky » thai ky, trai ky, sai ky
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su tai ky dang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su tai ky dang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: su tai ky dang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tri cua tre*.