Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
thien anh » thien danh, tien anh, thien thanh
trinh vat » trinh van, trinh luat, sinh vat
trinh va » trinh van, trinh ve, trinh vi
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
khan cap » khan ap, than cap, khoan cam

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 - hanh ((trinh va) OR (trinh vat)) nhung cong dan ((than cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien anh - hanh ((trinh va) OR (trinh vat)) nhung cong dan ((than cau) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien anh - hanh ((trinh va) OR (trinh vat)) nhung cong dan ((than cau) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc thien anh - hanh ((trinh va) OR (trinh vat)) nhung cong dan ((than cau) or (khan cap))*.