Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong cua » truong cua, huong cua, luong cua
thong cua » thong quan, thong tu, huong cua
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong van » cong vang, cong san, song van
phan cau » phan dau, phan cac, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh ((tuong cua) or (thong cua)) dung cong van ((phan cau) OR (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh ((tuong cua) OR (thong cua)) dung cong van ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh ((tuong cua) or (thong cua)) dung cong van ((phan cau) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh ((tuong cua) or (thong cua)) dung cong van ((phan cau) OR (phan tu))*.