Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
thanh da » thanh dat, thanh dam, thanh dan
cau tren » cu tren, dau tren, ca tren
bo sach » co sach, hoc sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
soc gia » toc gia, hoc gia, so gia
da cau » dat cau, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ty ((nang xa) or (dang xay)) hoi. hieu van cham soc gia thanh da cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty ((nang xa) OR (dang xay)) hoi. hieu van cham soc gia thanh da cau tren.
• Adding a wildcard symbol may retrieve word variants: bo sach ty ((nang xa) or (dang xay)) hoi. hieu van cham soc gia thanh da cau tren*.