Perhaps you should try some spelling variations:
hoc tieng » hoc hien
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
cong van » cong vang, song van, cong tan
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tieng) or (hoc thiet)) anh - canh tranh va thong ((cong van) OR (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tieng) OR (hoc thiet)) anh - canh tranh va thong ((cong van) OR (cong san)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc tieng) or (hoc thiet)) anh - canh tranh va thong ((cong van) OR (cong san)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc tieng) or (hoc thiet)) anh - canh tranh va thong ((cong van) OR (cong san)) phan cau*.