Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
tuan cau » toan cau, quan cau, tuan cu
toan ban » van ban
tung va » trung va, tuong va, dung va

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 tung va thong cong van ((tuan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - thanh tung va thong cong van ((tuan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (thien thanh)) - thanh tung va thong cong van ((tuan cau) or (toan ban))*.