Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thu sac » thu sach, thu san, thu xac
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
hanh di » hanh vi, hanh de, danh di
hang di » hang doi, hang vi, hang dien
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang co hoi. hieu ve pham thuc hanh ((hanh di) or (hang di)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang co hoi. hieu ve pham thuc hanh ((hanh di) OR (hang di)) cua tu.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang co hoi. hieu ve pham thuc hanh ((hanh di) or (hang di)) cua tu*.