Perhaps you should try some spelling variations:
lang thai » lang chai, dang thai, lang hai
thai cuu » thai cua, tai cuc, thi cuc
va lang » va nang, hoa lang
van hac » van hoc, van ha, van hai
van cac » van cau, van bac, dan cac
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
toc va » hoc va, toc ta, tuc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach ty)) nang xa hoi. hieu ((van cac) OR (van hac)) toc va lang thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu ((van cac) OR (van hac)) toc va lang thai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang xa hoi. hieu ((van cac) OR (van hac)) toc va lang thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu ((van cac) OR (van hac)) toc va lang thai cuu tre*.