Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
nang xa » lang xa, mang xa, ang xa
nang ma » tang ma, sang ma, nang cao
nam tuc » nam thuc, nam truc, nam tu
va tinh » may tinh
tinh ha » tinh hai, tinh hoa, tinh va
tuc va » thuc va, truc va, tuc xa
ha cua » hoa cua, hai cua, nha 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 y ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu van nam tuc va tinh ha cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((((nang xa) OR (nang ma))) OR (nang x)) hoi. hieu van nam tuc va tinh ha cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu van nam tuc va tinh ha cua te".
• Adding a wildcard symbol may retrieve word variants: so sach y ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu van nam tuc va tinh ha cua te*.