Perhaps you should try some spelling variations:
trang luan » tang luan, tranh luan, trang tuan
trinh luan » trinh luat, trinh quan, trinh han
duong tinh » duong minh, duong sinh, dong tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
ung duong » ung dung, tuong duong, cuong duong
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 (trinh luan)) ung duong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trang luan) OR (trinh luan)) ung duong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trang luan) or (trinh luan)) ung duong tinh toan cau*.