Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
suu viet » su viet, sau viet, sieu viet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
va hanh » va thanh, va danh, ban hanh
dao suu » dao huu, da suu
y nang » ky nang, ly nang, v nang
co tuc » co thuc, co tu, co toc

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 y nang xa hoi. ((hieu va) OR (hieu qua)) co tuc ((va hanh) or (van hanh)) dao suu viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((hieu va) OR (hieu qua)) co tuc ((va hanh) OR (van hanh)) dao suu viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu va) OR (hieu qua)) co tuc ((va hanh) or (van hanh)) dao suu viet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu va) OR (hieu qua)) co tuc ((va hanh) or (van hanh)) dao suu viet*.