Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
thu sac » thu sach, thu san, thu xac
hieu va » lieu va, hieu qua
cac lop » cac hop, cac loai
va hanh » van hanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang x hoi. hieu va cac lop ((va hanh) or (va thanh)) vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang x hoi. hieu va cac lop ((va hanh) OR (va thanh)) vai cua viet.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang x hoi. hieu va cac lop ((va hanh) or (va thanh)) vai cua viet*.