Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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 tinh) or (hieu lang)) - hanh ((trung va) OR (trang va)) nhung cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (hieu lang)) - hanh ((trung va) OR (trang va)) nhung cong dan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (hieu lang)) - hanh ((trung va) OR (trang va)) nhung cong dan phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (hieu lang)) - hanh ((trung va) OR (trang va)) nhung cong dan phan dau*.