Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
truong cua » truong ca, truong quan, truong cao
thang cong » thanh cong, thang long, thong cong
trung cua » trung tuan, trung cap, dung cua
cong hoan » cong hoa, dong hoa, cong san
hoan tuan » hoang tuan, doan tuan, hoan tran
tuan cau » toan cau, quan cau, tuan cu

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) OR (thien thanh)) - thanh ((trung cua) or (truong cua)) thang cong hoan tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - thanh ((trung cua) OR (truong cua)) thang cong hoan tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) OR (thien thanh)) - thanh ((trung cua) or (truong cua)) thang cong hoan tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) OR (thien thanh)) - thanh ((trung cua) or (truong cua)) thang cong hoan tuan cau*.