Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ve tai » te tai, de tai, le tai
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
cua te » cua tu

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: tu sach van nang xa hoi. hieu ((ve tai) OR (va cam)) thuc dan hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach van nang xa hoi. hieu ((ve tai) or (va cam)) thuc dan hanh vi cua te*.