Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
nam thuoc » nam thu, nha thuoc, cay thuoc
thu sach » thuat sach, thuoc sach, thu hoach
toan cua » than cua, tan cua, doanh cua
va thanh » gia thanh, ban thanh, va tinh
nam thuc » am thuc, nam thu, nam tu
hieu ve » hieu va, hieu van
ly hang » ly quang
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
hang x » nang x, hoang xa, chang xu
x hoi » xa hoi, o hoi, x ho

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) OR (tu sach)) ly hang x hoi. hieu ve ((nam thuc) or (nam thuoc)) va thanh toan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ly hang x hoi. hieu ve ((nam thuc) OR (nam thuoc)) va thanh toan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ly hang x hoi. hieu ve ((nam thuc) or (nam thuoc)) va thanh toan cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ly hang x hoi. hieu ve ((nam thuc) or (nam thuoc)) va thanh toan cua tre*.