Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
nang cong » nang song, dang cong, bang cong
vat nang » van nang, va nang, vat mang
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
toan ban » van ban
o chau » a chau, 3 chau, moc chau
ho chu » hoi chu, cho chu, ho chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((o chau) or (ho chu)) tinh - hanh sinh vat nang cong dan ((than cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((o chau) OR (ho chu)) tinh - hanh sinh vat nang cong dan ((than cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((o chau) or (ho chu)) tinh - hanh sinh vat nang cong dan ((than cau) or (toan ban))*.