Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tung » thanh tung, manh tung, hanh dung
cua nhung » va nhung
cong tinh » cong trinh, cong vinh, long tinh
anh tang » anh bang, anh dang, anh nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((hanh tung) or (anh tang)) cua nhung cong tinh ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((hanh tung) OR (anh tang)) cua nhung cong tinh ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - ((hanh tung) or (anh tang)) cua nhung cong tinh ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((hanh tung) or (anh tang)) cua nhung cong tinh ((toan ban) OR (van ban))*.