Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
luan dong » luan cong, luan nong, luan luong
quan dong » quang dong, quan long, quan hoang
hanh han » hanh nhan, hanh phan, hanh san
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh han ((luan dong) or (quan dong)) cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh han ((luan dong) OR (quan dong)) cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh han ((luan dong) or (quan dong)) cong dan ((toan cao) or (toan ban))*.