Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu
hoc thiet » hoc thuyet, toc thieu, hoc viet
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((hoc hien) or (hoc thieu))) or (hoc thiet)) anh - canh tranh va nhung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc hien) OR (hoc thieu))) OR (hoc thiet)) anh - canh tranh va nhung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: ((((hoc hien) or (hoc thieu))) or (hoc thiet)) anh - canh tranh va nhung cong dan chan cau*.