Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hanh tai, anh thai
hinh thai » sinh thai, tinh thai, dinh thi
kho tang » cao tang
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
sai kho » dai kho, tai khoa, dai khoa
duc van » duc va, duc tan, duc manh
su sai » su tai, su hai, su dai
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac

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