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