Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
mot chieu » doi chieu, ho chieu
cao nhat » cao chat, cap nhat, cao nhan
tung va » trung va, tuong va, dung va
tan cao » toan cao, tao cao, tay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) tinh - thanh tung va ((nhung cong) OR (thong cong)) tan cao nhat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) tinh - thanh tung va ((nhung cong) OR (thong cong)) tan cao nhat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) tinh - thanh tung va ((nhung cong) OR (thong cong)) tan cao nhat".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) tinh - thanh tung va ((nhung cong) OR (thong cong)) tan cao nhat*.