Perhaps you should try some spelling variations:
pduong thanh » phuong thanh, truong thanh, dong thanh
duong thanh » dong thanh, muong thanh, luong thanh
thien thanh » tien thanh, thi thanh, chien tranh
hien hanh » dieu hanh
canh ban » can ban, canh dan, canh van
toan ban » van ban
ban cua » ban quan

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 hanh) or (thien thanh)) - canh ban cua ban ((duong thanh) or (pduong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (thien thanh)) - canh ban cua ban ((duong thanh) OR (pduong thanh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (thien thanh)) - canh ban cua ban ((duong thanh) or (pduong thanh)) toan ban*.