Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cap phan » cac phan, cao phan, cau phan
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac
cap han » cap can, cap hay, cap van

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

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