Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua
manh cua » doanh cua, ban cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 - canh ((tranh cua) or (manh cua)) thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh ((tranh cua) OR (manh cua)) thong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((tranh cua) or (manh cua)) thong cong tac toan cau*.