Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
nang doc » nang luc
thuc dan » thuc hanh, hoc dan, thuc vat
thu sac » thu sach, thu san, thu xac
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
ve phan » va phan, ke phan, ve phat
hieu ve » hieu va, hieu van
nang co » nang cao, nang noi, nang hoc
sac ky » cac ky, sai ky
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 co) or (nang doc)) hoi. hieu ve phan thuc dan ((hanh di) OR (hanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang co) OR (nang doc)) hoi. hieu ve phan thuc dan ((hanh di) OR (hanh de)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky ((nang co) or (nang doc)) hoi. hieu ve phan thuc dan ((hanh di) OR (hanh de)) cua te".
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang co) or (nang doc)) hoi. hieu ve phan thuc dan ((hanh di) OR (hanh de)) cua te*.