Perhaps you should try some spelling variations:
thuoc nganh » thuong nganh, chuc nganh, thuat nganh
hoc nganh » hoc nhanh
phan phat » phap phat, van phat, phan phoi
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
phat van » pham van, phan van, phap van
tu sach » thu sach, su sach, te sach
ma co » mai co, mat co, mau co

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 cuu long ((thuoc nganh) OR (hoc nganh)) hoa hoc ma co phan phat van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu long ((thuoc nganh) OR (hoc nganh)) hoa hoc ma co phan phat van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu long ((thuoc nganh) OR (hoc nganh)) hoa hoc ma co phan phat van*.