Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
thanh do » thanh de, thanh pho, thanh hoa
toc gia » toc giay, tac gia, quoc gia
cam toc » cac toc, cao toc
so sach » bo sach, co sach, hoc sach
nang co » nang cao, nang doc, nang noi
so sanh » do sanh
co loi » co hoi
y nang » ky nang, ly nang, v nang
do cua » doi cua, co cua, de cua
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: ((so sach) or (so sanh)) y nang co loi. ((hieu van) OR (lieu va)) cam toc gia thanh do cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang co loi. ((hieu van) OR (lieu va)) cam toc gia thanh do cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) y nang co loi. ((hieu van) OR (lieu va)) cam toc gia thanh do cua te*".