Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
trinh quan » tinh quang, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc dieu
quan dung » quang dung, quan duong, qua dung
lan toan » dan toan, lap toan, manh toan
van toan » van tuan, van tan, van thanh

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

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