Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cac co » cac cong
co van » cao van, vo van, so van
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: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac co van thanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac co van thanh ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac co van thanh ((vai cua) or (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac co van thanh ((vai cua) or (hai cua)) tre*.