Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
tai khoa » da khoa, noi khoa
vai cua » dai cua, hai cua, lai cua
dua ban » dia ban, cua ban, qua ban
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
va cao » va cac, va co, va dao
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) OR (ty xang)) tai khoa. hieu ((ve cam) or (va cao)) dua ban hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) tai khoa. hieu ((ve cam) OR (va cao)) dua ban hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) tai khoa. hieu ((ve cam) or (va cao)) dua ban hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty xang)) tai khoa. hieu ((ve cam) or (va cao)) dua ban hanh vai cua triet*.