Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cua tre » cuu tre, cua triet, dua tren
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang xa hoi. hieu ((ve cac) or (va cam)) duc tan thanh pho ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu ((ve cac) OR (va cam)) duc tan thanh pho ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. hieu ((ve cac) or (va cam)) duc tan thanh pho ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu ((ve cac) or (va cam)) duc tan thanh pho ((cua tre) OR (cua te))*.