Perhaps you should try some spelling variations:
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nhanh khang » nhanh thang, nhanh quang, nhanh thanh
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
tong hoc » thong hoc, trong hoc, tong hop
thuoc va » thuc va, thuoc ma, thuong va
phap vat » phap luat, phap phat, phap viet
te sach » toc sach
hoi ban » hoi dan, hoi bai, doi ban
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoc tap, nghien cuu ((tong hoc) OR (tuong hoc)) nhanh khang thuoc va hoi ban phap vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cuu ((tong hoc) OR (tuong hoc)) nhanh khang thuoc va hoi ban phap vat".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu ((tong hoc) OR (tuong hoc)) nhanh khang thuoc va hoi ban phap vat*.