Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
tuong tac » cong tac, luong tai, tuong lai
hieu van » hieu va, thien van, lieu va
tuong va » truong va, thuong va, luong va
tac doan » tap doan, tan doan, thai doan
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu van)) - thanh tuong va nhung tuong tac doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu van)) - thanh tuong va nhung tuong tac doan tap.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (hieu van)) - thanh tuong va nhung tuong tac doan tap*.