Perhaps you should try some spelling variations:
thien hieu » thien nhien, thien chien, thien hue
hieu quang » thieu quang, hieu quan, hieu qua
truong cao » truong dai
trung cap » trung tam
dong cong » duong cong, dung cong, dang cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien hieu quang - thanh ((trung cap) or (truong cao)) dong cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien hieu quang - thanh ((trung cap) OR (truong cao)) dong cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: thien hieu quang - thanh ((trung cap) or (truong cao)) dong cong tinh toan ban*.