Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
khoa nganh » khoi nganh, hoc nganh
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cua toan, huu toan, cuu thanh
cuu hoan » luu hoang, cuu van, cuu khoa
cac khoi » cac thoi, cac khoan, cach thoi
phan van » pham van, thanh van, luan van
khoi va » hoi va, khi va, choi va
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc cach hoc tap, nghien ((cuu toan) OR (cuu hoan)) khoa nganh cong thuoc cac khoi va phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach hoc tap, nghien ((cuu toan) OR (cuu hoan)) khoa nganh cong thuoc cac khoi va phan van".
• Adding a wildcard symbol may retrieve word variants: thuoc cach hoc tap, nghien ((cuu toan) OR (cuu hoan)) khoa nganh cong thuoc cac khoi va phan van*.