Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, dua tren
cuu ban » cuu van, cua ban, cuu san
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
cuc ban » cua ban, cac ban, duc ban

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

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