Perhaps you should try some spelling variations:
thong trong » thuong trong, thong thong, thong thuong
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
trong tinh » truong tinh, trong kinh, trong sinh
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, doi chieu, mot chieu
toan tap » toan ban

You may be able to get more results by adjusting your search query.

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