Perhaps you should try some spelling variations:
nghiep cach » nghiep sach, nghiep cay, nghiep bac
nghien cac » nghien cuu, nghiep cay, nghiep bac
thanh phan » thanh san, thanh toan, thanh hai
hoa thanh » hoan thanh, ha thanh, hoc thanh
dan thanh » dang thanh, danh thanh, ban thanh
sach doi » sach hoi, sach moi, sach dao
cong hoa » dong hoa, dong hoc, hang hoa
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
pho hoc » phoi hoc, cho hoc, pho ho
hoi dan » hoa dan, hoc dan, hoi dap
hoc xa » hoc ma

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 doi tap, ((nghien cac) OR (nghiep cach)) cong hoa thanh pho hoc xa hoi dan thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi tap, ((nghien cac) OR (nghiep cach)) cong hoa thanh pho hoc xa hoi dan thanh phan".
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, ((nghien cac) OR (nghiep cach)) cong hoa thanh pho hoc xa hoi dan thanh phan*.