Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
dai ky » dai ly
sai ky » sac ky
dan ky » van ky

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

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