Perhaps you should try some spelling variations:
hanh hanh » hanh han, xanh hanh, nhanh thanh
pham thuc » phap thuc, pham chuc, nham thuc
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
hoi cua » hoi chuc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((co hoi) OR (co loi)). hieu ve pham thuc hanh hanh ((hoi cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((co hoi) OR (co loi)). hieu ve pham thuc hanh hanh ((hoi cua) OR (de cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((co hoi) OR (co loi)). hieu ve pham thuc hanh hanh ((hoi cua) or (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((co hoi) OR (co loi)). hieu ve pham thuc hanh hanh ((hoi cua) or (de cua)) te*.