Perhaps you should try some spelling variations:
dong thuoc » dang thuoc, don thuoc, dong thuc
nghiep va » nghiep vu
luc nganh » luc ngan, chuc nganh, luat nganh
sach hoc » cach hoc, sach hoi, mach hoc
dong luc » nang luc
tu sach » thu sach, su sach, te sach
va dong » van dong, ha dong, xa dong
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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 hoc tap, nghiep va dong luc nganh ((dong thuoc) OR (dung thuoc)) mai hoi va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghiep va dong luc nganh ((dong thuoc) OR (dung thuoc)) mai hoi va nhan va".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghiep va dong luc nganh ((dong thuoc) OR (dung thuoc)) mai hoi va nhan va*.