Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hoc chinh » hoan chinh, hoc sinh, hoc kinh
hoa chinh » hoan chinh, hoa hinh, hoa thinh
hang cong » dang cong, hang nong, bang cong
thang va » hang va, trang va, thong va
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cao » toan cao, thai cao, than cap
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chinh) or (hoa chinh)) sach - cang thang va hang cong ban than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoa chinh)) sach - cang thang va hang cong ban than cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoa chinh)) sach - cang thang va hang cong ban than cao*.