Perhaps you should try some spelling variations:
thanh nam » hanh nam, thanh pham, thanh nhan
thanh tam » thanh tai, thanh tay, thanh toan
nang hoa » nang hoat, hang hoa, nang hoc
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
co sach » bo sach, cuon sach, hoc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
van cac » van hac, van cau, van bac
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (co sach)) ky nang hoa hoi. hieu van cac du va ((thanh nam) or (thanh tam)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (co sach)) ky nang hoa hoi. hieu van cac du va ((thanh nam) OR (thanh tam)) su triet.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (co sach)) ky nang hoa hoi. hieu van cac du va ((thanh nam) or (thanh tam)) su triet*.