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
va nang » van nang, da nang, cam nang
khan ap » khan cap, han ap, khan dam

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 ap))~.
• 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 ap)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh tang) or (hanh trang)) va nang cong van ((than cau) or (khan ap))*.