Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
hanh dung » thanh dung, anh dung, hanh dong
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
dung cua » dung luan, dung cho
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doc hieu)) tinh - hanh dung cua ((thong cong) OR (tong cong)) tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doc hieu)) tinh - hanh dung cua ((thong cong) OR (tong cong)) tan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doc hieu)) tinh - hanh dung cua ((thong cong) OR (tong cong)) tan than cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doc hieu)) tinh - hanh dung cua ((thong cong) OR (tong cong)) tan than cao*.