Perhaps you should try some spelling variations:
dang xay » dang van, van xay
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
van cam » van nam, van lam, van cau
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

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