Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
khong chuc » cong chuc, hong phuc, khong che
hoc nhanh » hoc nganh, hoc phan
tran nhan » tran nhat, tan nhan, tran han
sach moi » sach doi, sach hoi, bach mai
hai tran » thai tran, hai tan, ha tran
nhan van » nhan dan, nhan va, phan van
tu sach » thu sach, su sach, te sach
moi tap » moi tai, toi tap
xua hai » qua hai, cua hai, xa hai
mo hoc » mon hoc, co hoc

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 moi tap, nghien cuu mo hoc nhanh ((khong chuc) or (khong thuoc)) xua hai tran nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach moi tap, nghien cuu mo hoc nhanh ((khong chuc) OR (khong thuoc)) xua hai tran nhan van*.