Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trong manh » trong minh, trong anh, trong mach
hoc thieu » toc thieu
manh toan » thanh toan, anh tuan, tinh toan
le trung » do trung
toan ban » van ban
ve rung » he trung, va trung, ve nhung

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 (hoc hien)) xanh - canh trinh ((ve rung) OR (le trung)) trong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - canh trinh ((ve rung) OR (le trung)) trong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) xanh - canh trinh ((ve rung) OR (le trung)) trong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - canh trinh ((ve rung) OR (le trung)) trong manh toan ban*.