Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
hanh thai » nhanh thai, hanh tai, anh thai
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
dung ha » dung va, dung he, dung khoa
hai ky » thai ky, hoi ky, hai ly
ve cam » ve cham, ve cac, va cam
su hai » su tai

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

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