Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
cong quang » luong quang, thong quang, duong quang
quang dong » quang dung, quan dong, quang cuong
dong cong » duong cong, dung cong, dang cong
cong dan » cong san, cong tan, huong dan
phan van » pham van, thanh van, luan van
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu hach - thanh cong quang dong cong dan ((phan van) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - thanh cong quang dong cong dan ((phan van) OR (phan cac))*.