Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
hoc thieu » toc thieu, hoc hien
thong cua » thong quan, thong tu, huong cua
dang cong » dung cong
hoc hieu » hoc hien, doc hieu, hoc dieu
cua dang » cua cong, cua ban
hang cau » hang dau, hang ca, nhung cau
han cau » phan cau, van cau, han dau

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) or (hoc thieu)) manh - thanh thong cua dang cong trinh ((han cau) or (hang cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - thanh thong cua dang cong trinh ((han cau) OR (hang cau)).
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) manh - thanh thong cua dang cong trinh ((han cau) or (hang cau))*.