Perhaps you should try some spelling variations:
dua tren » dung tren
dung doi » huong doi, dung tai, dung co
su sach » vu sach
xa dung » xay dung, xa dong, va dung
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ty nang x hoi. hieu ve cam tuc xa dung doi ((dua tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty nang x hoi. hieu ve cam tuc xa dung doi ((dua tren) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty nang x hoi. hieu ve cam tuc xa dung doi ((dua tren) or (cua tre))*.