Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, lieu va, hieu ve
ban hanh » ban hang
lam xuc » cam xuc, lam duoc
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
y sang » _ sang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
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: thu sach y sang ma hoi. ((hieu van) OR (thien van)) lam xuc ((ban hanh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y sang ma hoi. ((hieu van) OR (thien van)) lam xuc ((ban hanh) OR (van thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y sang ma hoi. ((hieu van) OR (thien van)) lam xuc ((ban hanh) or (van thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y sang ma hoi. ((hieu van) OR (thien van)) lam xuc ((ban hanh) or (van thanh)) vi cua tre*.