Perhaps you should try some spelling variations:
thuc nhanh » thuc hanh, thuc nhan, thuc thanh
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
khac thong » khac thuong, khac trong, khap thong
sinh kthoi » sinh khoi, sinh thai, sinh khoa
kthoi khac » thoi khac, khoa khac
thai khac » thoi khac, tham khao, thai hoc
sach dam » sach dao, sach dat, sach dau
dam thuc » am thuc, dan thuc, nam thuc
sach dan » sach danh, sach dao, sach dat
tu sach » thu sach, su sach, te sach
dan hoc » van hoc, dan toc, dai 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 dam thuc nhanh thai khac thong ) or ( tu sach dan hoc sinh kthoi khac thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dam thuc nhanh thai khac thong ) OR ( tu sach dan hoc sinh kthoi khac thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dam thuc nhanh thai khac thong ) or ( tu sach dan hoc sinh kthoi khac thong ))*.