Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
theo lich » thai lich, theo sach
trinh cua » tinh cua, trinh luat, trinh quan
dan toan » van toan, dan than, manh 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 ((theo lich) or (thien hach)) - hanh trinh cua ((nhung cong) or (thong cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo lich) OR (thien hach)) - hanh trinh cua ((nhung cong) OR (thong cong)) dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo lich) or (thien hach)) - hanh trinh cua ((nhung cong) or (thong cong)) dan toan tap*.