Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van tham » van tuan, van chat, van tai
van hanh » ban hanh, van anh, van ban
cuu tre » cua tre, cau tren, cau treo
va tham » va cham, va thanh, va thuat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
vi cuu » vi luu, vinh cuu
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 xa hoi. hieu ((va tham) OR (van tham)) nuoc ((van hanh) or (van thanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ((va tham) OR (van tham)) nuoc ((van hanh) OR (van thanh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu ((va tham) OR (van tham)) nuoc ((van hanh) or (van thanh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ((va tham) OR (van tham)) nuoc ((van hanh) or (van thanh)) vi cuu tre*.