Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
toc sach » hoc sach, doc sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
van hoi » van hoa, van hoc, van hoe
ty hang » ly hang, ty xang, thi hang
cau luc » cau phuc
dam cau » dat cau, da cau, dam cao
hieu ve » hieu va, hieu van
y hang » ly hang, yu hang, _ hang

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 ((y hang) OR (ty hang)) van hoi. hieu ve ((cau luc) or (cau truc)) gia thanh dam cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y hang) OR (ty hang)) van hoi. hieu ve ((cau luc) OR (cau truc)) gia thanh dam cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y hang) OR (ty hang)) van hoi. hieu ve ((cau luc) or (cau truc)) gia thanh dam cau tren".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y hang) OR (ty hang)) van hoi. hieu ve ((cau luc) or (cau truc)) gia thanh dam cau tren*.