Perhaps you should try some spelling variations:
trong manh » trong minh, trong anh, trong mach
hanh minh » thanh minh, hinh minh, hanh dinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
nhat dung » nha dung, nhat quang, thuat dung
manh toan » thanh toan, anh tuan, tinh toan
toc hieu » toc thieu, hoc thieu, thuc hieu
doc hieu » toc thieu, hoc thieu, hoc hien
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc hieu) OR (doc hieu)) quang - ((hanh minh) or (hanh tinh)) nhat dung trong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc hieu) OR (doc hieu)) quang - ((hanh minh) OR (hanh tinh)) nhat dung trong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc hieu) OR (doc hieu)) quang - ((hanh minh) or (hanh tinh)) nhat dung trong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((toc hieu) OR (doc hieu)) quang - ((hanh minh) or (hanh tinh)) nhat dung trong manh toan ban*.