Perhaps you should try some spelling variations:
ban hanh » ban hang
thai cua » than cua, tai cuc, tri cua
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
su hoi » su choi, su hai, lu hoi
ve cam » ve cham, ve cac, va cam

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

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