Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
van dinh » van minh, van dich, xuan dinh
va trien » va truyen, va thiet, va tuyen
cam duc » cam xuc, pham duc, nam duoc
sach ky » sac ky, sach y, sach ty
va dinh » va kinh, va tinh, vu dinh
cao duc » dao duc, cao suc, giao duc
x hoi » xa hoi, o hoi, x ho
cu va » cuu va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((van dinh) or (va dinh)) cu va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((van dinh) OR (va dinh)) cu va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((van dinh) or (va dinh)) cu va trien".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((van dinh) or (va dinh)) cu va trien*.