Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
hoc thieu » toc thieu, hoc hien
thong cua » thong quan, thong tu, huong cua
truong ca » truong cao, truong va, trong ca
cong van » cong vang, song van, cong tan
cong san » cong tac
phan dau » phan tu, hang dau

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 tach - thanh ((thong cua) or (truong ca)) dung ((cong van) or (cong san)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - thanh ((thong cua) OR (truong ca)) dung ((cong van) OR (cong san)) phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - thanh ((thong cua) or (truong ca)) dung ((cong van) or (cong san)) phan dau*.