Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hanh tai, anh thai
hinh thai » sinh thai, tinh thai, chinh tai
dinh thi » dinh tri
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
sai ky » sac ky
ve cac » va cac, vien cac
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 tang xa hoi. hieu ve cac duc van ((hanh thai) or (((hinh thai) OR (dinh thi)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky tang xa hoi. hieu ve cac duc van ((hanh thai) OR (((hinh thai) OR (dinh thi)))) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky tang xa hoi. hieu ve cac duc van ((hanh thai) or (((hinh thai) OR (dinh thi)))) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky tang xa hoi. hieu ve cac duc van ((hanh thai) or (((hinh thai) OR (dinh thi)))) cua tre*.