Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hanh tang » anh tang, hanh mang, hanh tung
nang cong » nang song, dang cong, bang cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong van » cong vang, cong san, song van
than cau » toan cau, phan cau, than cap
khan cap » khan ap, than cap, khoan cam
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((hanh tang) OR (hanh trang)) va nang cong van ((than cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh tang) OR (hanh trang)) va nang cong van ((than cau) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh tang) OR (hanh trang)) va nang cong van ((than cau) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh tang) OR (hanh trang)) va nang cong van ((than cau) or (khan cap))*.