Perhaps you should try some spelling variations:
hanh viet » anh viet, danh viet, han viet
dua tren » dung tren
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh
tham oc » tham nuoc, cham soc, tham hoa
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
oc van » hoc van, luoc van, quoc van

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 nang xa hoi. lieu va tham oc van ((hanh vi) or (hanh viet)) ((cuu tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. lieu va tham oc van ((hanh vi) OR (hanh viet)) ((cuu tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. lieu va tham oc van ((hanh vi) or (hanh viet)) ((cuu tre) or (dua tren))*.