Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
van cac » van hac, van bac, dan cac
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau treo
van cau » van dau, van hau, van chat
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: toc sach ty nang x hoi. hieu ((van cac) or (van cau)) duc va thanh dat ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang x hoi. hieu ((van cac) OR (van cau)) duc va thanh dat ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang x hoi. hieu ((van cac) or (van cau)) duc va thanh dat ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. hieu ((van cac) or (van cau)) duc va thanh dat ((cuu tre) OR (cau tren))*.