Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
mot chieu » doi chieu, ho chieu
dang cong » dung cong
trinh ve » trinh he, trinh va, trinh vi
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan 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 thieu) or (mot chieu)) sach - hanh trinh ve ((thanh cong) or (dang cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (mot chieu)) sach - hanh trinh ve ((thanh cong) OR (dang cong)) dan than tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (mot chieu)) sach - hanh trinh ve ((thanh cong) or (dang cong)) dan than tap*.