Perhaps you should try some spelling variations:
sach thoi » cach thoi, sach hoi, sach tham
hoc nhanh » hoc phan
thoi tap » toi tap, hoc tap, thoi dai
cuu toan » cuu hoan, cua toan, huu toan
nong hoc » dong hoc, nang hoc, nong thon
phap van » pham van, phan van, phap han
vu sach » vu bach, su sach, vu khach
va phap » va phat, ban phap
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: vu sach thoi tap, nghien cuu toan ((hoc nganh) or (hoc nhanh)) nong hoc xa hoi va phap van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thoi tap, nghien cuu toan ((hoc nganh) OR (hoc nhanh)) nong hoc xa hoi va phap van.
• Adding a wildcard symbol may retrieve word variants: vu sach thoi tap, nghien cuu toan ((hoc nganh) or (hoc nhanh)) nong hoc xa hoi va phap van*.