Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
csinh cua » chinh cua, tinh cua, trinh cua
hang cong » dang cong, hang nong, bang cong
tien anh » tieng anh, tien manh, dien anh
sinh cua » manh cua, dinh cuu, sinh va
cong san » cong tac
san tao » sang tao, san bao, san tay
tao cao » bao cao, toan cao

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 chanh) or (tien anh)) - hanh ((csinh cua) or (sinh cua)) hang cong san tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (tien anh)) - hanh ((csinh cua) OR (sinh cua)) hang cong san tao cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chanh) or (tien anh)) - hanh ((csinh cua) or (sinh cua)) hang cong san tao cao*.