Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, mot chieu, thi chieu
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, 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 thieu) or (((doi chieu) OR (ho chieu)))) xanh - canh tranh va nhung cong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (((doi chieu) OR (ho chieu)))) xanh - canh tranh va nhung cong tan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (((doi chieu) OR (ho chieu)))) xanh - canh tranh va nhung cong tan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (((doi chieu) OR (ho chieu)))) xanh - canh tranh va nhung cong tan phan cau*.