Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
tranh su » trang su, trang suc, tranh dau
trinh su » trinh tu, trinh san, trinh cau
cac toan » cac khoan, hach toan, cac thanh
toan tap » toan ban

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