Perhaps you should try some spelling variations:
thuc dan » thuc hanh, thuc vat
cau tren » cu tren, dau tren, ca tren
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
hanh va » hang va, hanh vi
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang x hoi. hieu va nham ((thuc dan) OR (hoc dan)) hanh va cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang x hoi. hieu va nham ((thuc dan) OR (hoc dan)) hanh va cau tren".
• Adding a wildcard symbol may retrieve word variants: co sach ky nang x hoi. hieu va nham ((thuc dan) OR (hoc dan)) hanh va cau tren*.