Perhaps you should try some spelling variations:
thuat tinh » thuat trinh, thuat kinh, thuat hinh
chua tinh » cua tinh, cha tinh, chua benh
trung vat » trung va, trong vat, truong van
trung van » truong van, trong van, trung va
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan thai » dang thai, dan thi, dan than
thai cao » tai cao, thoai cac, thuat cao

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

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