Perhaps you should try some spelling variations:
thuyet tach » thuyet mach, thuyet hach, thuyet xac
phuong cong » phuong dong, phong cong, phung cong
hoc thuyet » hoc chuyen
chinh cua » chinh sua, hinh cua, chinh luan
chinh ca » chinh ta, chinh va, chinh tai
cong dan » cong san, cong tan, huong dan
than man » than ma, tran manh, than phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet tach - hanh ((chinh cua) OR (chinh ca)) phuong cong dan ((than man) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet tach - hanh ((chinh cua) OR (chinh ca)) phuong cong dan ((than man) OR (thanh san)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thuyet tach - hanh ((chinh cua) OR (chinh ca)) phuong cong dan ((than man) or (thanh san))".
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tach - hanh ((chinh cua) OR (chinh ca)) phuong cong dan ((than man) or (thanh san))*.