Perhaps you should try some spelling variations:
chua vat » cua vat, chua va, thuat vat
quang xa » quan xa, quang ma, quang va
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
sach lo » sach dao, sach doi, sach hoi
sach ly » sach y, sach ty, sach hay
dao cua » dai cua, day cua, do cua
dan cua » dan ca, ban cua, dai cua
luc va » duc va, tuc va, loc va

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 lo)) quang xa hoi. hieu qua cham luc va ((dao cua) OR (dan cua)) chua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach lo)) quang xa hoi. hieu qua cham luc va ((dao cua) OR (dan cua)) chua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) or (sach lo)) quang xa hoi. hieu qua cham luc va ((dao cua) OR (dan cua)) chua vat*".