Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tang luan » dung luan
tho tinh » ha tinh, hoi tinh, hoa tinh
cong tan » cong tac, cong san, cong thanh
can tho » can thi, can ho, dan tho
ban cua » ban quan
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: can tho tinh - hanh ((ban cua) or (tang luan)) thong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: can tho tinh - hanh ((ban cua) OR (tang luan)) thong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: can tho tinh - hanh ((ban cua) or (tang luan)) thong cong tan van ban*.