Perhaps you should try some spelling variations:
luan dung » lan dung, luan dong, luan ung
luan hung » luan chung, lan hung, luan ung
trong anh » truong anh, trong nganh, trong doanh
theo mau » tho mau, theo dau, theo chu
mau sach » mat sach, cau sach, hau sach
tac dung » xay dung, tin dung, van dung
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo mau sach - ((sach dung) or (tac dung)) ((luan dung) OR (luan hung)) trong anh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo mau sach - ((sach dung) OR (tac dung)) ((luan dung) OR (luan hung)) trong anh tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo mau sach - ((sach dung) or (tac dung)) ((luan dung) OR (luan hung)) trong anh tuan cau".
• Adding a wildcard symbol may retrieve word variants: theo mau sach - ((sach dung) or (tac dung)) ((luan dung) OR (luan hung)) trong anh tuan cau*.