Perhaps you should try some spelling variations:
tcanh tinh » thanh tinh, nhanh tinh, hanh tinh
hieu cach » hieu cac, chieu sach, hieu ca
canh tinh » hanh tinh, manh tinh, canh tranh
tac thanh » bac thanh, cac thanh, tcc thanh
thanh ban » thanh san, thanh van, thanh bac
hoc hieu » hoc thieu, hoc hien, doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - ((canh tinh) or (tcanh tinh)) chat ((bang song) OR (nang song)) tac thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((canh tinh) OR (tcanh tinh)) chat ((bang song) OR (nang song)) tac thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - ((canh tinh) or (tcanh tinh)) chat ((bang song) OR (nang song)) tac thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((canh tinh) or (tcanh tinh)) chat ((bang song) OR (nang song)) tac thanh ban*.