Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
ca cao » ca dao, cu cao, ca cac

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 ((trung va) OR (trang va)) tong cong dan ca cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - thanh ((trung va) OR (trang va)) tong cong dan ca cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh ((trung va) OR (trang va)) tong cong dan ca cao*.