Perhaps you should try some spelling variations:
nguyen tai » nguyen thai, nguyen thi, nguyen tac
xuyen tai » xuyen tac, truyen tai, luyen thi
cach thuc » anh thuc, cac thu
thai cong » tai cong, thi cong, thanh cong
ca chua » ca cua, sua chua
ban ve » ban va
ve y » ve ky, ve _, ke y

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nguyen tai) or (xuyen tai)) ((ca chua) or (cach thuc)) đe co ban ve y thai cong (dong OR dung)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nguyen tai) OR (xuyen tai)) ((ca chua) OR (cach thuc)) đe co ban ve y thai cong (dong OR dung).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nguyen tai) or (xuyen tai)) ((ca chua) or (cach thuc)) đe co ban ve y thai cong (dong OR dung)".
• Adding a wildcard symbol may retrieve word variants: ((nguyen tai) or (xuyen tai)) ((ca chua) or (cach thuc)) đe co ban ve y thai cong (dong OR dung)*.