Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, mot chieu
mang cua » manh cua, dung cua, ban cua
tan toan » tap toan, van toan, dan toan

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 (doi chieu)) tinh - hanh mang cua nhung cong ((tan toan) or (tan tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - hanh mang cua nhung cong ((tan toan) OR (tan tran)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tinh - hanh mang cua nhung cong ((tan toan) or (tan tran)) cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tinh - hanh mang cua nhung cong ((tan toan) or (tan tran)) cao*.