Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
thanh da » thanh dat, thanh dam, thanh dan
hieu van » hieu va, thien van, lieu va
van chat » cao chat
lang xa » lang ha, dang xay, lang van
sanh ty » sach ty, canh tay
mang xa » mang may, dang xay, mang cua
soc gia » toc gia, hoc gia, quoc gia
so sanh » do sanh
so gia » so giai, so giao, ho gia
da dau » dan dau, dat dau, 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: so sanh ty ((mang xa) or (lang xa)) hoi. hieu van chat ((soc gia) or (so gia)) thanh da dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty ((mang xa) OR (lang xa)) hoi. hieu van chat ((soc gia) OR (so gia)) thanh da dau tren.
• Adding a wildcard symbol may retrieve word variants: so sanh ty ((mang xa) or (lang xa)) hoi. hieu van chat ((soc gia) or (so gia)) thanh da dau tren*.