Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
phuong van » phung van, phuong lan, phuong va
hieu lang » chieu sang, hieu quang, nhieu tang
tuan doan » quan doan, tuan hoan, tan doan
phong van » phung van, thong van, phong va
ban tai » van tai, han tai, ban thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chieu sach)) - manh trung tuan doan ((phuong van) OR (phong van)) ban tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sach)) - manh trung tuan doan ((phuong van) OR (phong van)) ban tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) or (chieu sach)) - manh trung tuan doan ((phuong van) OR (phong van)) ban tai".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sach)) - manh trung tuan doan ((phuong van) OR (phong van)) ban tai*.