Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
hanh via » hanh vi, hanh va, anh va
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
may thoi » gay thoi, may thi, tay thoi
ke mang » ke nang, ke trang
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
tu sach » thu sach, te sach, tu cach
via cua » gia cua, gian cua, giau cua
tu sac » tu cac, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (((tu sach) OR (su sach)))) ke mang may thoi. hieu va nham thuc dan hanh via cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (((tu sach) OR (su sach)))) ke mang may thoi. hieu va nham thuc dan hanh via cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (((tu sach) OR (su sach)))) ke mang may thoi. hieu va nham thuc dan hanh via cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (((tu sach) OR (su sach)))) ke mang may thoi. hieu va nham thuc dan hanh via cua triet*.