Perhaps you should try some spelling variations:
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nganh khang » nganh khong, ngan hang, nhanh thang
nghien huu » nghien cuu, nguyen huu, nhiem huu
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
tung hoc » trung hoc, dung hoc, tung ho
thuoc ma » hoc ma, duoc ma
phap vat » phap luat, phap phat, phap viet
tu sach » thu sach, su sach, te sach
va phap » va phat, ban phap
ma hoi » mai hoi, xa hoi, ma hoa

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, nghien huu ((tung hoc) or (tuong hoc)) nganh khang thuoc ma hoi va phap vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien huu ((tung hoc) OR (tuong hoc)) nganh khang thuoc ma hoi va phap vat.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien huu ((tung hoc) or (tuong hoc)) nganh khang thuoc ma hoi va phap vat*.