Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong luong » cong thuong, nang luong, cong dong
hoc thieu » toc thieu
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong lang » cong vang, cong quang, cong ngang
phan dau » phan tu, hang dau

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) or (hoc hien)) sach - thanh trung cua nhung ((cong lang) OR (cong luong)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - thanh trung cua nhung ((cong lang) OR (cong luong)) phan dau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) sach - thanh trung cua nhung ((cong lang) OR (cong luong)) phan dau*".