Perhaps you should try some spelling variations:
trang luan » tang luan, trang tuan, truong luan
tranh luan » trinh luat, doanh luan, tang luan
trinh luan » trinh luat, trinh quan, trinh han
hien xanh » hien hanh, hien nhanh, chieu xanh
dung tinh » dang tinh, dung ninh, dung tin
toan cau » toan cao, toan ban, toan tap

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

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