Perhaps you should try some spelling variations:
hoc thieu » toc thieu
manh tung » manh hung, thanh tung
nhung don » nhung van, nhung bo
dung cong » dung trong
tung cap » trung cap, cung cap, thong cap
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam

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 - manh tung cap ((nhung don) or (dung cong)) ban khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - manh tung cap ((nhung don) OR (dung cong)) ban khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (hoc hien)) sach - manh tung cap ((nhung don) or (dung cong)) ban khan cap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (hoc hien)) sach - manh tung cap ((nhung don) or (dung cong)) ban khan cap*.