Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
cham cuu » cap cuu, chat cua
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu ban » cuu van, cua ban, cuu san
cua tre » cua te, cuu tre, dua tren

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) or (toc sach)) ky lang xa hoi. hieu van cham cuu ban hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky lang xa hoi. hieu van cham cuu ban hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky lang xa hoi. hieu van cham cuu ban hanh vi ((cua tre) or (cua triet))*.