Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
trung tuan » trung thanh, tran tuan, truong thanh
phong cong » phong chong, thong cong, chong cong
hoc thien » hoc hien, hoc thieu, hoc thiet
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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

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