Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, khoa thuoc
thieu trac » thi trac, thieu cac, thieu tai
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nhanh » hoc nganh, hoc phan
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan
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 thieu trac, nghien cuu mo hoc nhanh ((khong thuoc) OR (dong thuoc)) xa hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thieu trac, nghien cuu mo hoc nhanh ((khong thuoc) OR (dong thuoc)) xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu sach thieu trac, nghien cuu mo hoc nhanh ((khong thuoc) OR (dong thuoc)) xa hoi va nhan dan*.