Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » tong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
trang va » tran van, hang va
ban khan » ban than, ban nhan, ban chan
khan ap » khan cap, han ap, khan dam

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 sach - thanh ((trang va) or (truong va)) ((thong cong) or (trong cong)) ban khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trang va) OR (truong va)) ((thong cong) OR (trong cong)) ban khan ap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trang va) or (truong va)) ((thong cong) or (trong cong)) ban khan ap*.