Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ty » sach tu, sach thu, xach tay
nam tuc » nam thuc, nam truc, nam tu
xa hanh » xa thanh, xa khanh, va hanh
ang xa » lang xa, mang xa, dang xay
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach y)) ang xa hoi. hieu van nam tuc xa hanh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ang xa hoi. hieu van nam tuc xa hanh ((di cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) ang xa hoi. hieu van nam tuc xa hanh ((di cua) OR (de cua)) tre*".