Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh xay » trinh ky
trong van » trong cac
phong cau » phong cac, phong cai, phong cach
thong cau » thong cac, thong cap, thong tu
hoc hieu » hoc thieu, hoc hien, doc hieu

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 nganh - canh trinh xay dung trong van ((phong cau) OR (thong cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - canh trinh xay dung trong van ((phong cau) OR (thong cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - canh trinh xay dung trong van ((phong cau) OR (thong cau))*.