Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
nang hoc » nang luc, dong hoc, hang hoa
nang doc » nang luc
cong tap » cuong tap, cong tac, cong tan
tap danh » tac danh, tao danh, tap dan
danh bat » doanh bat, anh bai, dinh ba

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - hanh ((nang hoc) or (nang doc)) thong cong tap danh bat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - hanh ((nang hoc) OR (nang doc)) thong cong tap danh bat.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - hanh ((nang hoc) or (nang doc)) thong cong tap danh bat*.