Perhaps you should try some spelling variations:
dang xay » dang van, van xay
toc sach » hoc sach, doc sach, thuoc sach
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
long ha » dong ha, cong ha, dong hoa
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
sach o » sach lo, sac o, sach y
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach o ((long ha) OR (dang xay)) hoi. hieu ve cam thuc vat hanh vi cua tuc~.
• Adding a wildcard symbol may retrieve word variants: toc sach o ((long ha) or (dang xay)) hoi. hieu ve cam thuc vat hanh vi cua tuc*.