Perhaps you should try some spelling variations:
trong trinh » trong tinh, trang trinh, trong thinh
trinh toan » tinh toan, thanh toan, trinh han
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
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 mang)) 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 mang)) 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 mang)) trai dung trong trinh toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - ((hanh tang) OR (hanh mang)) trai dung trong trinh toan tap*.