Perhaps you should try some spelling variations:
duong truong » duong trong, truong trung, tang truong
truong cong » trong cong, truong dong, truong long
trinh dinh » trinh kinh, trinh sinh, trinh dung
tieu sach » chieu sach, dien sach, te sach
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cong dan » cong san, cong tan, huong dan
phan dau » phan tu
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((hanh dinh) or (trinh dinh)) duong truong cong dan ((phan dau) OR (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh dinh) OR (trinh dinh)) duong truong cong dan ((phan dau) OR (hang dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((hanh dinh) or (trinh dinh)) duong truong cong dan ((phan dau) OR (hang dau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh dinh) or (trinh dinh)) duong truong cong dan ((phan dau) OR (hang dau))*.