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
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
dan thai » dang thai, dan thi, ban thai
dan than » dan chan, ban than, van than

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)) thong cong ((dan thai) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh ((trung va) OR (trang va)) thong cong ((dan thai) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - thanh ((trung va) OR (trang va)) thong cong ((dan thai) or (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh ((trung va) OR (trang va)) thong cong ((dan thai) or (dan than)) cao*.