Perhaps you should try some spelling variations:
dang xay » dang van, van xay
so sach » so sanh, bo sach, co sach
cam tuc » cam xuc, cam tu, nam thuc
qua cam » qua cham, qua cac, qua ca
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
va dau » va dao
dau vi » dau ve, dau va, dat vi
vi cua » vai cua, di 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 (sang ma))) or (dang xay)) hoi. hieu qua cam tuc va dau vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((((nang xa) OR (sang ma))) OR (dang xay)) hoi. hieu qua cam tuc va dau vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y ((((nang xa) or (sang ma))) or (dang xay)) hoi. hieu qua cam tuc va dau vi cua tre*.