Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
cham luc » cham soc, nhan luc, cham cuu
cua chua » sua chua, cua chu, cua nhua
chua vat » cua vat, chua va, thuat vat
sach ly » sach y, sach lo, sach ty
quan xa » quan ha, quan va, quan cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc va » duc va, tuc va, loc va
va dai » va dao, vi dai, va dau

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 ly) or (sach doi)) quan xa hoi. hieu va cham luc va dai cua chua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach doi)) quan xa hoi. hieu va cham luc va dai cua chua vat*.