Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thieu sang » chieu sang, thieu khang, thieu quang
hieu lang » chieu sang, hieu quang, nhieu tang
trang ung » trang vuong, trang phung, trang cong
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan cao
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: hoc ((thieu sang) or (hieu lang)) - hanh trang ung dung cong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (hieu lang)) - hanh trang ung dung cong dan ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (hieu lang)) - hanh trang ung dung cong dan ((toan tai) or (toan ban))*.