Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dang khai » dang khoi, dang hai, quang khai
bac nuoc » cac nuoc, bach tuoc, sach nuoc
thi hanh » thi thanh
cua tre » cua te, cua triet, dua tren
va dang » van dang, va nang, va lang
sach ky » sac ky, sach y, sach ty
thi lan » thi nang, thi lien
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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 ky nang xa hoi. ((thi hanh) or (thi lan)) bac nuoc va dang khai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. ((thi hanh) OR (thi lan)) bac nuoc va dang khai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. ((thi hanh) or (thi lan)) bac nuoc va dang khai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. ((thi hanh) or (thi lan)) bac nuoc va dang khai ((cua tre) OR (cuu tre))*.