Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
manh trung » manh tung, thanh trung, manh hung
hoc thieu » toc thieu, hoc hien
trung dam » trung tam, trung dai, trong dam
dam hang » dat hang, dam tang, dai hang
cong san » cong tac
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 thieu tinh - manh trung dam hang ((cong san) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - manh trung dam hang ((cong san) OR (huong dan)) toan cau*.