Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien tinh » khien tinh, thien tinh, dien tinh
bien tinh » bi tinh, yen tinh, diep tinh
tang cua » mang cua, hang cua, tang luan
ban quan » van quan
cong van » cong vang, cong san, song van
van tai » von tai, van tuan
tai sao » tai san

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tinh) OR (bien tinh)) - hanh ((tang cua) or (ban quan)) thong cong van tai sao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (bien tinh)) - hanh ((tang cua) OR (ban quan)) thong cong van tai sao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (bien tinh)) - hanh ((tang cua) or (ban quan)) thong cong van tai sao*".