Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cam » van lam, van cau, van dam
va hanh » va thanh, va danh, ban hanh
le cua » ly cua
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: te sach ly nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va hanh) or (van hanh)) le cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va hanh) OR (van hanh)) le cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va hanh) or (van hanh)) le cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang x hoi. hieu ((van cam) OR (van nam)) xuc ((va hanh) or (van hanh)) le cua viet*.