Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hoc chieu » hoc thieu, hoc hien, hoc dieu
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
ban phan » ban phap, van phan, ban than
phan tap » phan lap, han tap, pha tap

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 (ho chieu)) sach - hanh trinh vat ((nhung cong) or (dung cong)) ban phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) sach - hanh trinh vat ((nhung cong) OR (dung cong)) ban phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (ho chieu)) sach - hanh trinh vat ((nhung cong) or (dung cong)) ban phan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (ho chieu)) sach - hanh trinh vat ((nhung cong) or (dung cong)) ban phan tap*.