Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
canh trinh » canh tranh, hanh trinh, canh tinh
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
quan dung » quang dung, quan duong, qua dung
luan phan » luan van
luan hoan » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) xanh - canh trinh quan dung trong ((luan phan) OR (luan hoan)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) xanh - canh trinh quan dung trong ((luan phan) OR (luan hoan)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (hoc thieu)) xanh - canh trinh quan dung trong ((luan phan) OR (luan hoan)) tu".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) xanh - canh trinh quan dung trong ((luan phan) OR (luan hoan)) tu*.