Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
ve cac » va cac, vien cac
dai ky » dan ky, dai ly
sai ky » sac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((dai ky) or (sai ky)) lang xa hoi. hieu ve cac duc van hanh thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((dai ky) OR (sai ky)) lang xa hoi. hieu ve cac duc van hanh thai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((dai ky) or (sai ky)) lang xa hoi. hieu ve cac duc van hanh thai ((cua tre) or (cua te))*.