Perhaps you should try some spelling variations:
sang than » cang thang, dang thanh, sang tao
cap nuoc » dat nuoc
than cua » nhan cua, thai cua, ban cua
vua sang » bua sang, cua sang, lua sang
cac nuoc » hoc nuoc, dat nuoc, cua nuoc
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach ty, sach kem
cua te » cua tu
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: thuat ((sach ky) or (sach y)) nang x hoi. hieu van ((cac nuoc) or (cap nuoc)) vua sang than cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach y)) nang x hoi. hieu van ((cac nuoc) OR (cap nuoc)) vua sang than cua te.
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) or (sach y)) nang x hoi. hieu van ((cac nuoc) or (cap nuoc)) vua sang than cua te*.