Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung doi » huong doi, dung tai, dung co
vat dung » van dung, va dung, viet dung
hieu van » thien van, lieu va, hieu ve
tuc vat » thuc vat, tuc va, tuc hat
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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 ky nang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung doi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu va) OR (hieu van)) cam tuc vat dung doi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung doi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung doi ((cua tre) OR (cua triet))*.