Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong hang » phuong hoang, phuong bang, phuong hanh
hieu quang » thieu quang, hieu quan, hieu qua
hieu sang » chieu sang, hieu lang, nhieu tang
va phuong » va thuong, cac phuong
trung va » truong va, trang va, trung ha
tuan chu » tuan thu, quan chu, tan chu
va tuan » van tuan, va quan, va toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sang) or (hieu quang)) - thanh trung va phuong hang va tuan chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (hieu quang)) - thanh trung va phuong hang va tuan chu.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) or (hieu quang)) - thanh trung va phuong hang va tuan chu*.