Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, dung cua, thong cua
trung cap » truong cao, trung tam
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh ((((trung cua) or (trung cap))) or (trung tuan)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh ((((trung cua) OR (trung cap))) OR (trung tuan)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh ((((trung cua) or (trung cap))) or (trung tuan)) nhung cong dan toan cau*.