Perhaps you should try some spelling variations:
phan thuc » nhan thuc, pham thuc, phan khuc
phap thuc » phap thu, phap hoc, phap tu
nang noi » nang doc
hieu van » hieu va, thien van, lieu va
dan hanh » dang hanh, dan khanh, dan thanh
tu sach » thu sach, su sach, te sach
noi hoi » noi doi, doi hoi, hoi hoi
sach ky » sac ky, sach y, sach ty
de cua » le cua, te cua, dieu cua
di cua » dai cua, doi cua, do 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 sach ky nang noi hoi. hieu van ((phan thuc) or (phap thuc)) dan hanh ((di cua) OR (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang noi hoi. hieu van ((phan thuc) OR (phap thuc)) dan hanh ((di cua) OR (de cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang noi hoi. hieu van ((phan thuc) or (phap thuc)) dan hanh ((di cua) OR (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang noi hoi. hieu van ((phan thuc) or (phap thuc)) dan hanh ((di cua) OR (de cua)) te*.