Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
khong cang » thong cong, hong bang, khong dung
trinh toan » tinh toan, thanh toan, trinh han
tranh cua » doanh cua, manh cua
ho chieu » hoc thieu, doi chieu, mot chieu
toan cao » toan ban, toan tap

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