Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
hac nuoc » hoc nuoc, cac nuoc, phap nuoc
van dang » van dong, van dung, van nang
sach ky » sac ky, sach y, sach ty
van hac » van hoc, van ha, van hai
va dang » va nang, va lang, da dang
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su
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 ky nang x hoi. hieu van hac nuoc ((va dang) or (van dang)) thai ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang x hoi. hieu van hac nuoc ((va dang) OR (van dang)) thai ((cua tu) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang x hoi. hieu van hac nuoc ((va dang) or (van dang)) thai ((cua tu) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. hieu van hac nuoc ((va dang) or (van dang)) thai ((cua tu) OR (cua cu))*.