Perhaps you should try some spelling variations:
lang thang » cang thang, dang thanh, hung thang
hoc thieu » hoc hien
cong chuc » cong thuc, cong cu, cong cua
chuc hang » chuc nang, chuc hanh, phuc hang
hang cong » dang cong, hang nong, bang cong
cong lang » cong vang, cong luong, cong quang
thang cau » hang cau, thong cau, thanh chau

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 (toc thieu)) sach - thanh cong chuc hang cong lang thang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - thanh cong chuc hang cong lang thang cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - thanh cong chuc hang cong lang thang cau*.