Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
hanh phan » thanh phan, anh phan, hanh han
ho chieu » theo chieu, doi chieu, mot chieu
cong tac » cong ty
toan tap » toan ban
pham tai » pham thi, pham van
phan va » phan van, nhan va, han va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) xanh - hanh phan va nhung cong tac ((toan tap) or (pham tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh phan va nhung cong tac ((toan tap) OR (pham tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - hanh phan va nhung cong tac ((toan tap) or (pham tai))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - hanh phan va nhung cong tac ((toan tap) or (pham tai))*.