Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tuc qua » tuc cua, truc quan, tac quan
toc qua » goc qua, tac quan, hoc quan
duy cua » day cua, dung cua
y nang » ky nang, ly nang, v nang
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 hoi. hieu ve cam ((tuc qua) OR (toc 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 hoi. hieu ve cam ((tuc qua) OR (toc 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 hoi. hieu ve cam ((tuc qua) OR (toc qua)) kinh ((du cua) or (duy cua)) tu".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu ve cam ((tuc qua) OR (toc qua)) kinh ((du cua) or (duy cua)) tu*.