Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van nang » van quang, van ban, van dong
thai cua » than cua, tai cuc, tri cua
sach ky » sac ky, sach y, sach ty
va nang » da nang, cam nang, kha nang
ma hoi » mai hoi, ma hoa, me hoi
cua te » cua tu

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 ((ma hoi) OR (xa hoi)). lieu va cac nuoc ((va nang) or (van nang)) thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac nuoc ((va nang) OR (van nang)) thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac nuoc ((va nang) or (van nang)) thai cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac nuoc ((va nang) or (van nang)) thai cua te*.