Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tung tuan » trung tuan, hung tuan, quang tuan
toan cau » toan ban, toan tap, toan tai
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 - thanh tung tuan ((nhung cong) or (dung trong)) dan ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh tung tuan ((nhung cong) OR (dung trong)) dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - thanh tung tuan ((nhung cong) or (dung trong)) dan ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh tung tuan ((nhung cong) or (dung trong)) dan ((toan cau) OR (toan cao))*.