Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (hoc thieu)) xanh - canh ((tranh va) or (trang va)) thong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) xanh - canh ((tranh va) OR (trang va)) thong cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) xanh - canh ((tranh va) or (trang va)) thong cong dan than tap*.