Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
duc ban » duc tan, duc van, dua ban
dang xa » dang xay, lang xa, dang ha
sac ky » cac ky
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sai ky)) dang xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sai ky)) dang xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (sai ky)) dang xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sai ky)) dang xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh tri cua tre*.