Perhaps you should try some spelling variations:
cuu thuc » cuu tac
tu sach » thu sach, su sach, te sach
van cam » van lam, van cau, van dam
va danh » va dinh, va hanh, dia danh
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau
vi cuu » vi luu, vinh cuu
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: tu sach y nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va danh) or (va dan)) vi cuu thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va danh) OR (va dan)) vi cuu thuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va danh) or (va dan)) vi cuu thuc".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va danh) or (va dan)) vi cuu thuc*.