Perhaps you should try some spelling variations:
thieu thanh » thien thanh, thi thanh, thu thanh
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc day » thuc day, thuoc dac, thuoc dang
thanh xa » thanh ha, thanh va, thanh ba
hanh tai » thanh tai, han tai, hinh tai
hang tai » hang va, dung tai
dau tren » dau tien, dat tren, dau tieng
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thieu thanh xa hoi. hieu ve nam thuoc day ((hanh tai) or (hang tai)) dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thieu thanh xa hoi. hieu ve nam thuoc day ((hanh tai) OR (hang tai)) dau tren.
• Adding a wildcard symbol may retrieve word variants: su sach thieu thanh xa hoi. hieu ve nam thuoc day ((hanh tai) or (hang tai)) dau tren*.