Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
nang co » nang cao, nang doc, nang noi
hieu ve » hieu van
hoi cua » hoi chuc
hieu va » lieu va, hieu qua
de cua » le cua, te cua, dieu cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi

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. ((hieu ve) OR (hieu va)) pham thuc dan 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. ((hieu ve) OR (hieu va)) pham thuc dan 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. ((hieu ve) OR (hieu va)) pham thuc dan hanh ((hoi cua) or (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang co hoi. ((hieu ve) OR (hieu va)) pham thuc dan hanh ((hoi cua) or (de cua)) te*.