Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
van hanh » van thanh, ban hanh, van anh
vat hanh » vat thanh, va hanh, nhat hanh
thu sac » thu sach, thu san, thu xac
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
moi doi » voi doi, hoi doi, moi voi
noi doi » voi doi, hoi doi, hoi doai
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
cua te » cua tu

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 ((noi doi) or (moi doi)). hieu va pham thuc ((vat hanh) OR (van hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((noi doi) OR (moi doi)). hieu va pham thuc ((vat hanh) OR (van hanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang ((noi doi) or (moi doi)). hieu va pham thuc ((vat hanh) OR (van hanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((noi doi) or (moi doi)). hieu va pham thuc ((vat hanh) OR (van hanh)) di cua te*.