Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
hanh truong » hanh trong, anh truong, manh truong
khien bang » phien ban, khien dong
cong quang » luong quang, thong quang, duong quang
hien sang » hien trang, chieu sang, thien bang
cong cong » cong dong, trong cong, dung cong
quan cua » quan luan, ban cua, gian cua
tuan cu » tuan tu, tuan thu, than cua

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 sang) or (khien bang)) - hanh truong thanh cong cong quang ((tuan cu) OR (quan cua))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (khien bang)) - hanh truong thanh cong cong quang ((tuan cu) OR (quan cua)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) or (khien bang)) - hanh truong thanh cong cong quang ((tuan cu) OR (quan cua))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) or (khien bang)) - hanh truong thanh cong cong quang ((tuan cu) OR (quan cua))*.