Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
manh trung » manh tung, thanh trung, manh hung
thong cong » trong cong, tong cong, thong thong
bien canh » bien tinh, bien dang
trung cua » truong cua, trung tuan, trung cap
tan thai » tay thai, ban thai, tan tai
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((bien canh) or (chinh sach)) - manh trung cua ((nhung cong) OR (thong cong)) tan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((bien canh) OR (chinh sach)) - manh trung cua ((nhung cong) OR (thong cong)) tan thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((bien canh) or (chinh sach)) - manh trung cua ((nhung cong) OR (thong cong)) tan thai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((bien canh) or (chinh sach)) - manh trung cua ((nhung cong) OR (thong cong)) tan thai cao*.