Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thiet, hoc tien
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
hang tai » hang va, dung tai
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » 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 thien) OR (hoc thieu)) anh - hanh ((tang luan) or (hang tai)) nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thien) OR (hoc thieu)) anh - hanh ((tang luan) OR (hang tai)) nhung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) OR (hoc thieu)) anh - hanh ((tang luan) or (hang tai)) nhung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) OR (hoc thieu)) anh - hanh ((tang luan) or (hang tai)) nhung cong tan toan cau*.