Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
hanh tri » thanh tri, hanh tai, hanh trinh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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