Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
so sanh » do sanh
mai hoi » mai khoi, dai hoi, lai hoi
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (cho sinh)) y nang mai hoi. hieu van cham truc va hanh vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (cho sinh)) y nang mai hoi. hieu van cham truc va hanh vi ca viet.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (cho sinh)) y nang mai hoi. hieu van cham truc va hanh vi ca viet*.