Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc dao » thuc dan, thuc day, chuc dao
nam thuc » nam thuoc, am thuc, nam thu
cau tren » cu tren, dau tren, ca tren
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
ky lang » ky nang, ky tang, tay lang
dao dan » dao van, cao dang, dao dong
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre, cau treo
va nam » van nam, ha nam, va nay

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 lang) OR (ky dang)) xa hoi. hieu va nam thuc dao dan vai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ky lang) OR (ky dang)) xa hoi. hieu va nam thuc dao dan vai ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ky lang) OR (ky dang)) xa hoi. hieu va nam thuc dao dan vai ((cuu tre) or (cau tren))*".