Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
bach tuoc » sach duoc, sach nuoc
hieu van » hieu va, thien van, lieu va
bac nuoc » cac nuoc, sach nuoc, hoc nuoc
van dang » van dong, van dung, van nang
va dang » va nang, va lang, da dang
y nang » ky nang, ly nang, v nang
cuc te » cua te, cuc thue, cuc tieu
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 ((bac nuoc) OR (bach tuoc)) ((va dang) or (van dang)) tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. hieu van ((bac nuoc) OR (bach tuoc)) ((va dang) OR (van dang)) tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. hieu van ((bac nuoc) OR (bach tuoc)) ((va dang) or (van dang)) tai cuc te".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. hieu van ((bac nuoc) OR (bach tuoc)) ((va dang) or (van dang)) tai cuc te*.