Perhaps you should try some spelling variations:
truong huong » truong phuong, truong thuong, truong vuong
tang truong » tang cuong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh tang » tranh hang, tranh trong, trinh trang
ho chieu » theo chieu, hoc thieu, doi chieu
chan ban » can ban, chat ban, chan doan
chan nan » chan nhan, chang nang, chan doan
doi chi » doi khi

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 chi)) sach - hanh tranh tang truong huong dan ((chan ban) OR (chan nan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) sach - hanh tranh tang truong huong dan ((chan ban) OR (chan nan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chi)) sach - hanh tranh tang truong huong dan ((chan ban) OR (chan nan))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) sach - hanh tranh tang truong huong dan ((chan ban) OR (chan nan))*.