Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, thuc vat
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
di cua » dai cua, doi cua, do 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 hoi. hieu va pham ((thuc dan) OR (hoc dan)) hanh ((di cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoi. hieu va pham ((thuc dan) OR (hoc dan)) hanh ((di cua) OR (de cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoi. hieu va pham ((thuc dan) OR (hoc dan)) hanh ((di cua) or (de cua)) te*".