Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
thanh trung » thanh tung
tuan nhung » quan nhung, tuan hung, tranh nhung
hieu lang » chieu sang, hieu quang, nhieu tang
trinh san » trinh han, trinh quan, trinh toan
san tay » ban tay, dan tay, han tay

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (hieu lang)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong trinh san tay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (hieu lang)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong trinh san tay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (hieu lang)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong trinh san tay".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (hieu lang)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong trinh san tay*.