Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thu sach » tu sach, thuat sach, thuoc sach
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
nang noi » nang doc
sach ky » sac ky, sach y, sach ty
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang hoc
co cua » con cua, ca cua, cong cua
de cua » le cua, te cua, dieu cua

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 noi)) loi. hieu va pham thuc dan hanh ((co cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang co) OR (nang noi)) loi. hieu va pham thuc dan hanh ((co cua) OR (de cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang co) OR (nang noi)) loi. hieu va pham thuc dan hanh ((co cua) or (de cua)) te*".