Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van dang » van dong, van dung, van nang
cuc tieu » muc tieu, cac tieu, cach tieu
van cac » van hac, van cau, van bac
va dang » va nang, va lang, da dang
y nang » ky nang, ly nang, v nang
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: thuat sach y nang x hoi. hieu van cac nuoc ((va dang) or (van dang)) tai cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. hieu van cac nuoc ((va dang) OR (van dang)) tai cuc tieu.
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. hieu van cac nuoc ((va dang) or (van dang)) tai cuc tieu*.