Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
duc ban » duc tan, dua ban, duc man
sach ky » sac ky, sach y, sach ty
van lam » van nam
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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: su sach ky lang xa hoi. hieu van lam ((duc ban) OR (duc van)) thanh van ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu van lam ((duc ban) OR (duc van)) thanh van ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu van lam ((duc ban) OR (duc van)) thanh van ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu van lam ((duc ban) OR (duc van)) thanh van ((cua tre) or (cua te))*.