Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
lang ha » long ha
lang xa » dang xay, lang van
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((lang xa) or (lang ha)) hoi. hieu ((ve cham) or (va cham)) duc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((lang xa) OR (lang ha)) hoi. hieu ((ve cham) OR (va cham)) duc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((lang xa) or (lang ha)) hoi. hieu ((ve cham) or (va cham)) duc van hanh vi cua tre*.