Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
ho chieu » theo chieu, doi chieu, mot chieu
tranh va » tranh van, trang va, trinh va
tran 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: ((ho chieu) or (hoc thieu)) sach - canh ((tranh va) or (tran van)) dung cong than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - canh ((tranh va) OR (tran van)) dung cong than phan cac.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sach - canh ((tranh va) or (tran van)) dung cong than phan cac*.