Perhaps you should try some spelling variations:
vuong quang » luong quang, vuong quan, duong quang
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung tuan » trung thanh, tran tuan, truong thanh
quang tuan » quang thanh, quan luan, quang cua
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (chieu sach)) - hanh ((trung tuan) or (trung tam)) hoang vuong quang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - hanh ((trung tuan) OR (trung tam)) hoang vuong quang tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - hanh ((trung tuan) or (trung tam)) hoang vuong quang tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - hanh ((trung tuan) or (trung tam)) hoang vuong quang tuan cau*.