Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
thuc dan » thuc hanh, hoc dan, thuc vat
thu hanh » thuc hanh, thu thanh, thuy hanh
hanh vai » hanh vi, hanh va, hanh tai
dan hanh » dang hanh, dan khanh, dan thanh
sach thu » sach thue, sach thieu, sach tham
tu sach » thu sach, su sach, te sach
hanh vu » hanh vi, hanh va, hanh tu
ve nam » he nam, va nam, le nam
vu hoi » vu khoi, va hoi, vu hai
va cai » va cac, va bai, va dai

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 thu hanh vu hoi. hieu ((ve nam) or (va cai)) thuc dan hanh vai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu hanh vu hoi. hieu ((ve nam) OR (va cai)) thuc dan hanh vai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thu hanh vu hoi. hieu ((ve nam) or (va cai)) thuc dan hanh vai ((cua triet) or (cua viet))*.