Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
cua trong » cua truong, cua trung, qua trong
qua trinh » qua kinh
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, mot chieu
vang ban » van ban, hang ban, nang ban
ban cao » bao cao, ban can, ban co

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 (doi chieu)) sach - canh tranh ((cua trong) or (qua trinh)) cong vang ban cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh tranh ((cua trong) OR (qua trinh)) cong vang ban cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - canh tranh ((cua trong) or (qua trinh)) cong vang ban cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - canh tranh ((cua trong) or (qua trinh)) cong vang ban cao*.