Perhaps you should try some spelling variations:
thanh nuoc » thanh ngoc, thanh phuoc, thanh nguoi
van thanh » ban thanh, van tuan
va thanh » gia thanh, ban thanh, va tinh
van hanh » ban hanh, van anh, van ban
luu tre » luu tru, cuu tre, luy tre
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vi luu » vi lua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va thanh nuoc ((van hanh) or (van thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va thanh nuoc ((van hanh) OR (van thanh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va thanh nuoc ((van hanh) or (van thanh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va thanh nuoc ((van hanh) or (van thanh)) vi luu tre*.