Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hanh trang » thanh trung, hanh trinh, minh trang
hoc thieu » toc thieu, hoc hien
cong nhat » cong nhan, cong ha, cong suat
cong hat » cong chat, cong ha, cong hai
phan cau » phan dau, phan cac, phan tu
va tong » va thong, va tuong, va trong

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 manh - ((hanh trang) or (canh tranh)) va tong ((cong hat) OR (cong nhat)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - ((hanh trang) OR (canh tranh)) va tong ((cong hat) OR (cong nhat)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - ((hanh trang) or (canh tranh)) va tong ((cong hat) OR (cong nhat)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - ((hanh trang) or (canh tranh)) va tong ((cong hat) OR (cong nhat)) phan cau*.