Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
ve cham » va cham, ve chat, vu cham
van anh » van thanh, tuan anh, van minh
su sai » su tai, su hai, su dai
ve cac » va cac, vien cac
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky dang ha hoi. hieu ((ve cham) or (ve cac)) duc ((van hanh) OR (van anh)) tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky dang ha hoi. hieu ((ve cham) OR (ve cac)) duc ((van hanh) OR (van anh)) tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky dang ha hoi. hieu ((ve cham) or (ve cac)) duc ((van hanh) OR (van anh)) tri cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky dang ha hoi. hieu ((ve cham) or (ve cac)) duc ((van hanh) OR (van anh)) tri cua tre*.