Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thien hach » thien thanh, hien hanh
trang cua » tranh cua, tang cua, trung cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
hieu va » lieu va, hieu qua

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 hach) or (hieu va)) - hanh trang cua ((hang cong) or (bang cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (hieu va)) - hanh trang cua ((hang cong) OR (bang cong)) dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (hieu va)) - hanh trang cua ((hang cong) or (bang cong)) dan than cao*.