Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
van cam » van nam, van lam, van cau
dua ban » dia ban, cua ban, mua ban
sach ky » sac ky, sach y, sach ty
qua ban » cua ban, qua quan
nang xa » nang x, lang xa, nang ma
benh vi » benh va, benh ve, benh li
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: thu sach ky nang xa hoi. hieu van cam ((dua ban) OR (qua ban)) benh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van cam ((dua ban) OR (qua ban)) benh vi ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu van cam ((dua ban) OR (qua ban)) benh vi ((cua tre) or (cua triet))*".