Perhaps you should try some spelling variations:
luat duoc » luat tuc
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
lam xuc » cam xuc, lam duoc
sang ma » tang ma, nang ma, mang may
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 y ((sang ma) OR (sang tao)) hoa. hieu van ((lam xuc) or (luat duoc)) ban thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (sang tao)) hoa. hieu van ((lam xuc) OR (luat duoc)) ban thanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((sang ma) OR (sang tao)) hoa. hieu van ((lam xuc) or (luat duoc)) ban thanh di cua tre*".