Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
ve cac » va cac, vien cac
su hai » su tai
su sai » su tai, su dai, su mai

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) or (su hai)) ky ((dang xa) or (lang xa)) hoi. hieu ve cac duc va hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su hai)) ky ((dang xa) OR (lang xa)) hoi. hieu ve cac duc va hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su hai)) ky ((dang xa) or (lang xa)) hoi. hieu ve cac duc va hanh thai cua tre*.