Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nham thuc » nhan thuc, nam thuc, nham thu
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
va nham » va cham, va tham, va nha
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
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: thuoc sach ty nang x hoi. lieu va nham thuc va ((danh vai) OR (doanh van)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang x hoi. lieu va nham thuc va ((danh vai) OR (doanh van)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty nang x hoi. lieu va nham thuc va ((danh vai) OR (doanh van)) ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang x hoi. lieu va nham thuc va ((danh vai) OR (doanh van)) ((cua tre) or (cuu tre))*.