Perhaps you should try some spelling variations:
tuyen quang » nguyen quang, tuyen dung, tuyen duong
thanh trung » thanh tung
phuong cong » phuong dong, phong cong, phung cong
cua phuong » cuu phuong, cuc phuong, luan phuong
thien van » thi van
trung cua » truong cua, trung tuan, trung cap
ban khan » ban than, ban nhan, ban thanh
ban chan » dan chan, ban than, ban nhan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien van) or (tuyen quang)) - thanh trung cua phuong cong ((ban khan) OR (ban chan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien van) OR (tuyen quang)) - thanh trung cua phuong cong ((ban khan) OR (ban chan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien van) or (tuyen quang)) - thanh trung cua phuong cong ((ban khan) OR (ban chan)) cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien van) or (tuyen quang)) - thanh trung cua phuong cong ((ban khan) OR (ban chan)) cap*.