Perhaps you should try some spelling variations:
cuong cong » cong cong, luong cong, duong cong
hoc thieu » toc thieu, hoc hien
cong tinh » cong trinh, cong vinh, long tinh
doc hieu » toc thieu, hoc hien
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (doc hieu)) sach - nhanh ((lang van) OR (tang van)) cuong cong tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) sach - nhanh ((lang van) OR (tang van)) cuong cong tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doc hieu)) sach - nhanh ((lang van) OR (tang van)) cuong cong tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) sach - nhanh ((lang van) OR (tang van)) cuong cong tinh toan cao*.