Perhaps you should try some spelling variations:
sach thanh » sach tranh, sach tham, danh thanh
thuat sach » thuat lanh, thuat san
thanh tai » thanh hai, thanh toan, doanh tai
thap tai » phap tai, tap tai, pham tai
thai tai » thai tay, thai tran, tri tai
dung tri » dung tai, dung tren, dung sai
su sach » so sach, vu sach

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 ((thap tai) or (thai tai)) ) or ((( su sach dung tri ) or ( su sach thanh tai ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat sach ((thap tai) OR (thai tai)) ) OR ((( su sach dung tri ) OR ( su sach thanh tai )))).
• Adding a wildcard symbol may retrieve word variants: (( thuat sach ((thap tai) or (thai tai)) ) or ((( su sach dung tri ) or ( su sach thanh tai ))))*.