Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va triet » va thiet, va trien, ve triet
xa thanh » va thanh, ha thanh, ta thanh
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
xuc xa » tuc xa, buc xa
dai va » mai va
va cam » va cham, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y nang) or (v nang)) ma hoi. hieu ((va cam) or (va cac)) xuc xa thanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (v nang)) ma hoi. hieu ((va cam) OR (va cac)) xuc xa thanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) or (v nang)) ma hoi. hieu ((va cam) or (va cac)) xuc xa thanh dai va triet*.