Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
trong quan » thong quan, tong quan, thong quang
hien xanh » hien hanh, hien nhanh, chieu xanh
quan van » luan van, quan va, quan luan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - tranh trong quan van ((cong dan) or (cong tan)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - tranh trong quan van ((cong dan) OR (cong tan)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - tranh trong quan van ((cong dan) or (cong tan)) ((toan cau) or (toan ban))*.