Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc hien
manh vung » manh hung, manh tung, manh dung
hang cong » dang cong, hang nong, bang cong
vung dat » dung dat, vung va
dat hang » dat khanh, dat quang, tat thang
cong may » cong xay, cong ma, cong hay
may khoa » da khoa, ly khoa, y khoa
khoa dan » khoa dang, hoa dan, khoa can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (toc thieu)) sach - manh vung dat hang cong may khoa dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (toc thieu)) sach - manh vung dat hang cong may khoa dan*.