Perhaps you should try some spelling variations:
nam tren » nam tien, nam truyen, nam trong
hai nam » ha nam, loai nam
va daoh » va danh, va doanh
cac dac » cac dan, cac dai, cac bac
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
te sach » toc sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
va dao » ca dao
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((sang ma) OR (nang ma)) hoi. hieu ve cac dac ((va daoh) OR (va dao)) hai nam tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((sang ma) OR (nang ma)) hoi. hieu ve cac dac ((va daoh) or (va dao)) hai nam tren~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((sang ma) OR (nang ma)) hoi. hieu ve cac dac ((va daoh) or (va dao)) hai nam tren*.