Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
cong san » cong tac
song van » hoang van, trong van, duong van
toan cau » toan cao, toan ban, toan tap
phan cac » nhan cach, phan dau, phan lap
cong va » dong va, cong ha, cong tac

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 sach - thanh cong va nhung ((cong san) or (song van)) ((toan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh cong va nhung ((cong san) OR (song van)) ((toan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh cong va nhung ((cong san) or (song van)) ((toan cau) or (phan cac))*.