Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
cap dung » cao dung, chan dung, cach dung
van tren » van tien, quan tren, van trung
dat tren » dat trong, dua tren
ap dung » xay dung, van dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sang - thanh trung ((cap dung) OR (ap dung)) cong ((van tren) or (dat tren)) chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - thanh trung ((cap dung) OR (ap dung)) cong ((van tren) OR (dat tren)) chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - thanh trung ((cap dung) OR (ap dung)) cong ((van tren) or (dat tren)) chau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - thanh trung ((cap dung) OR (ap dung)) cong ((van tren) or (dat tren)) chau*.