Perhaps you should try some spelling variations:
trung tran » trung tuan, trung thanh, trung tam
hanh trung » thanh trung, hanh trang, manh trung
quan trong » gian trong
hieu manh » chieu xanh, hieu nganh, hien hanh
tran quan » tran quang, tran xuan, tran tuan
trong dan » trong dang, trong san, trong tan
dan toan » van toan, dan than, manh 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: hoc ((hieu manh) OR (dieu hanh)) - hanh trung tran quan trong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - hanh trung tran quan trong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - hanh trung tran quan trong dan toan cao*.