Perhaps you should try some spelling variations:
ky trang » ke trang, ky trong, ky tang
trang xa » trang va, trang ha, trong xa
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cac duy » cac du, cac quy, cach dua
duy van » duy vat, dung van
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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

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