Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cua viet » ca viet, hoa viet, cua vat
cac cuoc » cac nuoc, ca cuoc, cac quoc
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cac suc » cao suc, cac nuoc, cac quoc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu van ((cac suc) or (cac cuoc)) manh hanh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu van ((cac suc) OR (cac cuoc)) manh hanh vi ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu van ((cac suc) or (cac cuoc)) manh hanh vi ((cua tre) or (cua viet))*.