Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
trung chuan » trung tuan, trung phan, trinh chuan
trong chuan » thong chuan, trong chan, trong thuan
thien danh » thien anh, thien dang, thien chanh
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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 danh) or (thien thanh)) - thanh ((trung chuan) OR (trong chuan)) dong cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien thanh)) - thanh ((trung chuan) OR (trong chuan)) dong cong tan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (thien thanh)) - thanh ((trung chuan) OR (trong chuan)) dong cong tan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (thien thanh)) - thanh ((trung chuan) OR (trong chuan)) dong cong tan toan tap*.