Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » hien hanh, thien thanh, tien thanh
cong vang » cong lang, cong quang, cong ngang
trung va » truong va, trang va, trung ha
cong van » cong san, song van, cong tan
phan tai » pham tai, nhan tai, phan thi
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nhanh - thanh trung va dung ((cong van) OR (cong vang)) phan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - thanh trung va dung ((cong van) OR (cong vang)) phan tai".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - thanh trung va dung ((cong van) OR (cong vang)) phan tai*.