Perhaps you should try some spelling variations:
thai cuu » thai cua, tai cuc, thi cuc
dau thai » dau thau, da thai, dao thai
van cau » van dau, van hau, van chat
van cac » van hac, van bac, dan cac
sach ly » sach y, sach ty, sach hay
sach lo » sach dao, sach doi, sach hoi
cuu tre » cua tre, cau tren, cau treo
vang x » nang x
va dau » va dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ly) OR (sach lo)) vang x hoi. hieu ((van cac) or (van cau)) nuoc va dau thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach lo)) vang x hoi. hieu ((van cac) OR (van cau)) nuoc va dau thai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) OR (sach lo)) vang x hoi. hieu ((van cac) or (van cau)) nuoc va dau thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) OR (sach lo)) vang x hoi. hieu ((van cac) or (van cau)) nuoc va dau thai cuu tre*.