Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
van anh » van thanh, tuan anh, van minh
hieu ve » hieu van
duc van » duc va, duc tan, duc manh
ve cua » le cua, de cua, te cua
anh ve » hanh ve, anh va, anh viet
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: toc sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) or (hieu va)) pham duc van anh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) pham duc van anh ve cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) or (hieu va)) pham duc van anh ve cua te*".