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
trinh ven » trinh van, trinh den, tinh ven
trinh ve » trinh he, trinh va, trinh vi
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
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 ((trinh ve) or (trinh ven)) thong cong san ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh ((trinh ve) OR (trinh ven)) thong cong san ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((trinh ve) or (trinh ven)) thong cong san ((toan cau) or (toan tap))*.