Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hieu viec » nhieu viec, hieu ve, sieu viet
doanh cao » doanh co, doanh bao, doanh cho
hoc sach » hoc sinh, hoc cac, hoc anh
lang van » dang van, tang van, hoang van
viec cap » viec ap, viec nhap, viec cua
cap nuoc » dat nuoc
va doanh » van doanh, vay doanh, va danh
ky lang » ky nang, ky dang, ky tang
van hoc » van hoa
cao cua » ca cua, co cua, cau cua
cua tre » cua te, cuu tre, cua triet

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 (hoc sach)) ky lang van hoc. hieu viec cap nuoc va doanh cao cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky lang van hoc. hieu viec cap nuoc va doanh cao cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky lang van hoc. hieu viec cap nuoc va doanh cao cua tre*.