Perhaps you should try some spelling variations:
bach thanh » bac thanh, ban thanh, danh thanh
anh tranh » canh tranh, lanh tranh, anh thanh
thanh tai » thanh hai, thanh toan, doanh tai
phap tai » pham tai, phap tang, phap day
phap thi » pham thi, phan thi, phap thu
tranh do » trinh do, thanh do, trang do
tu sach » thu sach, su sach, te sach
su anh » sua anh, vu anh, tu anh

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 ((phap tai) OR (phap thi)) ) or ((( su anh tranh do ) or ( vu bach thanh tai ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ((phap tai) OR (phap thi)) ) OR ((( su anh tranh do ) OR ( vu bach thanh tai )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach ((phap tai) OR (phap thi)) ) or ((( su anh tranh do ) or ( vu bach thanh tai ))))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach ((phap tai) OR (phap thi)) ) or ((( su anh tranh do ) or ( vu bach thanh tai ))))*.