Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
cong van » cong vang, cong san, song van
van chat » cao chat
chat tap » chat tai, chat thai, chat va

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