Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
phan thuc » nhan thuc, phap thuc, phan khuc
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
dan hanh » dang hanh, dan khanh, dan thanh
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
hanh de » hanh ve, hanh kem
de cua » le cua, te cua, dieu 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 sach ky nang co hoc. hieu van ((phan thuc) OR (pham thuc)) dan hanh de cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoc. hieu van ((phan thuc) OR (pham thuc)) dan hanh de cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoc. hieu van ((phan thuc) OR (pham thuc)) dan hanh de cua te*.