Perhaps you should try some spelling variations:
trong trinh » trong tinh, trang trinh, trong thinh
hanh trang » thanh trung, canh tranh, hanh trinh
trinh toan » tinh toan, thanh toan, trinh han
hanh tang » anh tang, hanh mang, hanh tung
trai dung » tran dung, tri dung, thai duong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (ho chieu)) xanh - ((hanh tang) OR (hanh trang)) trai dung trong trinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) xanh - ((hanh tang) OR (hanh trang)) trai dung trong trinh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) xanh - ((hanh tang) OR (hanh trang)) trai dung trong trinh toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - ((hanh tang) OR (hanh trang)) trai dung trong trinh toan tap*.