Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
va thong » va thuong, va phuong, he thong
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
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: ((theo chieu) or (doi chieu)) tinh - ((hanh tang) or (hanh mang)) va thong cong tam toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) tinh - ((hanh tang) OR (hanh mang)) va thong cong tam toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) tinh - ((hanh tang) or (hanh mang)) va thong cong tam toan cao*.