Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
danh vai » danh sai, danh va, doanh van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ca viet » va viet, co viet, hoa viet
xuc va » tuc va, luc va, xac va
vai ca » vai cac, vai cua, bai ca

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) or (te sach)) ky lang xa hoi. hieu vu cham ((xuc va) OR (duc va)) danh vai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (te sach)) ky lang xa hoi. hieu vu cham ((xuc va) OR (duc va)) danh vai ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (te sach)) ky lang xa hoi. hieu vu cham ((xuc va) OR (duc va)) danh vai ca viet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (te sach)) ky lang xa hoi. hieu vu cham ((xuc va) OR (duc va)) danh vai ca viet*.