Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
canh tinh » hanh tinh, manh tinh, canh tranh
ho chieu » theo chieu, doi chieu, mot chieu
cong san » cong tac
san chan » san chang, dan chan, san chay
chan tu » phan tu, han tu, chon tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - ((canh tinh) or (hanh trinh)) va nhung cong san chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - ((canh tinh) OR (hanh trinh)) va nhung cong san chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - ((canh tinh) or (hanh trinh)) va nhung cong san chan tu".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - ((canh tinh) or (hanh trinh)) va nhung cong san chan tu*.