Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thu sach » tu sach, thuat sach, thuoc sach
nang doc » nang luc
sach ky » sac ky, sach y, sach ty
hang di » hang doi, hang vi, hang dien
hanh de » hanh ve, hanh kem
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang co » nang cao, nang noi, nang hoc
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) or (nang doc)) loi. hieu ve pham thuc vat ((hanh de) or (hang di)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang co) OR (nang doc)) loi. hieu ve pham thuc vat ((hanh de) OR (hang di)) cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang co) or (nang doc)) loi. hieu ve pham thuc vat ((hanh de) or (hang di)) cua te*.