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
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
dung ha » dung va, dung he, dung khoa
hieu ve » hieu va, hieu van
ky dung » ly dung, ky dang, ky vung
sai ky » sac ky
ve cam » ve cham, ve cac, va cam
ha hoi » hoa hoi, ha noi, xa hoi
su sai » su tai, su hai, su dai

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 ky dung ha hoi. hieu ve cam duc van ((hanh thai) or (hinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky dung ha hoi. hieu ve cam duc van ((hanh thai) OR (hinh thai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky dung ha hoi. hieu ve cam duc van ((hanh thai) or (hinh thai)) cua tre*.