Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
thanh da » thanh dat, thanh dan, thanh ha
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
soc gia » toc gia, hoc gia, so gia

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty xang xa hoi. hieu van cham soc gia ((thanh da) OR (thanh dam)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty xang xa hoi. hieu van cham soc gia ((thanh da) OR (thanh dam)) cau tren".
• Adding a wildcard symbol may retrieve word variants: so sach ty xang xa hoi. hieu van cham soc gia ((thanh da) OR (thanh dam)) cau tren*.