Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
danh vai » danh sai, danh va, doanh van
ban danh » ban doanh, ban hanh, ban dan
su triet » su viet, su tien, ve triet
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ky lang » ky nang, ky tang, tay lang
cua tre » cua te, cuu tre, cua triet
co cua » con cua, ca cua, cong cua
ve co » vo co, va co, de co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ve co cua ban danh vai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ve co cua ban danh vai ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ve co cua ban danh vai ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ve co cua ban danh vai ((cua tre) or (su triet))*.