Perhaps you should try some spelling variations:
hoc thien » hoc hien, hoc thieu, hoc thiet
thien anh » thien danh, tien anh, thien thanh
doanh cua » doanh luan
dung cong » dung trong
manh cua » ban cua
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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 anh - canh ((manh cua) or (doanh cua)) dung cong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien anh - canh ((manh cua) OR (doanh cua)) dung cong dan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien anh - canh ((manh cua) or (doanh cua)) dung cong dan phan cau*.