Perhaps you should try some spelling variations:
thuc dang » thuoc dang, thuc dan, thuc dung
dang dinh » dang sinh, dang dieu, dang hanh
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
qua nam » quan nam, cua nam, quang nam
dinh va » dinh van, dinh ve, tinh va
chua te » chua tu, chua xe, chuan ted
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (cuoc cach)) ky nang cao hoi. hieu qua nam thuc dang dinh va ((chua te) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (cuoc cach)) ky nang cao hoi. hieu qua nam thuc dang dinh va ((chua te) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (cuoc cach)) ky nang cao hoi. hieu qua nam thuc dang dinh va ((chua te) or (cua te))*.