Perhaps you should try some spelling variations:
dan nhanh » dan hanh, dan khanh, dan thanh
cham hoc » cham soc, chat hoc, cham hoi
nhanh vi » hanh vi, nhanh va, nhanh thi
tu sach » thu sach, su sach, te sach
xang xa » lang xa, mang xa, ang xa
hieu vu » hieu va, hieu ve, hieu su
y xang » ty xang
cua tu » cua tuc, cua su, cua cu

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 y xang xa hoi. ((hieu vu) or (lieu va)) cham hoc dan nhanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y xang xa hoi. ((hieu vu) OR (lieu va)) cham hoc dan nhanh vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach y xang xa hoi. ((hieu vu) or (lieu va)) cham hoc dan nhanh vi ((cua te) or (cua tu))*.