Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
cac nuoc » cap nuoc, dat nuoc, cua nuoc
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ta » sach tai, sach xa, sach ha
xay hoi » xa hoi, tay hoi, cay phoi
tai cua » thai cua, tai cuc, tri cua
ta van » tan van, tap van, va van
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ta van xay hoi. thieu bien ((cac nuoc) or (hoc nuoc)) van hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ta van xay hoi. thieu bien ((cac nuoc) OR (hoc nuoc)) van hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ta van xay hoi. thieu bien ((cac nuoc) or (hoc nuoc)) van hanh tai cua te*.