Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
doc hieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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)) xanh - hanh hang ((cua thong) OR (cua khong)) cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) xanh - hanh hang ((cua thong) OR (cua khong)) cong tan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doc hieu)) xanh - hanh hang ((cua thong) OR (cua khong)) cong tan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) xanh - hanh hang ((cua thong) OR (cua khong)) cong tan toan tap*.