Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
manh hanh » danh thanh, minh thanh, manh huynh
toc sach » hoc sach, doc sach, thuoc sach
cac cuoc » cac nuoc, ca cuoc, cac quoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ty sang » ty hang, duy sang, thu sang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ty sang) OR (ty xang)) ma hoi. hieu ve cac cuoc ((manh hanh) or (xanh hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty sang) OR (ty xang)) ma hoi. hieu ve cac cuoc ((manh hanh) OR (xanh hanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty sang) OR (ty xang)) ma hoi. hieu ve cac cuoc ((manh hanh) or (xanh hanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty sang) OR (ty xang)) ma hoi. hieu ve cac cuoc ((manh hanh) or (xanh hanh)) dai cua tre*.