Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
duy cua » day cua, dung cua
tuc qua » toc qua, tuc cua, truc quan
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, va cam
du cua » dau cua, dum cua, hu cua

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)) hoi. hieu ve cam tuc qua kinh ((du cua) or (duy cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc qua kinh ((du cua) OR (duy cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc qua kinh ((du cua) or (duy cua)) tu".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc qua kinh ((du cua) or (duy cua)) tu*.