Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang thai » dang thai, lang thai, van thai
hoc lieu » hoc dieu, hoc sieu, hoc tieu
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc lieu tinh - hanh ((trung va) OR (trang va)) dung cong vang thai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc lieu tinh - hanh ((trung va) OR (trang va)) dung cong vang thai cao*".