Perhaps you should try some spelling variations:
hanh tainh » hanh trinh, hanh tinh, thanh trinh
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
dang xa » dang xay, lang xa, dang ha
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
ky dang » ky nang, ky danh
cua tre » cuu tre, cua triet, dua tren
tai ky » thai ky, trai ky, sai 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: tu tai ky dang xa hoi. hieu van cam duc ban ((hanh tai) or (hanh tainh)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tai ky dang xa hoi. hieu van cam duc ban ((hanh tai) OR (hanh tainh)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu tai ky dang xa hoi. hieu van cam duc ban ((hanh tai) or (hanh tainh)) ((cua tre) or (cua te))*.