Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
may hoi » may thoi, tay hoi, mai hoi
ke mang » ke nang, ke trang
ky mang » ky nang, ky dang, ky tang
vi cua » vai cua, di cua
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ((ky mang) or (ke mang)) may hoi. hieu va tham ((thuc ban) OR (thuc dan)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ((ky mang) OR (ke mang)) may hoi. hieu va tham ((thuc ban) OR (thuc dan)) hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ((ky mang) or (ke mang)) may hoi. hieu va tham ((thuc ban) OR (thuc dan)) hanh vi cua triet*".