Perhaps you should try some spelling variations:
duong dai » duong dao, duong tai, truong dai
dong dai » dong tai, dong dat, dong dao
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
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: vu sac ky nang x hoi. ((hieu ve) or (lieu va)) cam tuc xa ((dong dai) OR (duong dai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang x hoi. ((hieu ve) OR (lieu va)) cam tuc xa ((dong dai) OR (duong dai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang x hoi. ((hieu ve) or (lieu va)) cam tuc xa ((dong dai) OR (duong dai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang x hoi. ((hieu ve) or (lieu va)) cam tuc xa ((dong dai) OR (duong dai)) cua tre*.