Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trong manh » trong minh, trong anh, trong mach
hoc thieu » toc thieu, hoc hien
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc hien
toan cao » toan ban, toan tap
ve dung » ve duong, va dung, te dung
ve rung » le trung, he trung, va trung

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

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