Perhaps you should try some spelling variations:
su triet » su viet, ve triet
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
su tien » su kien, su hien, tu tieng
va nam » van nam, ha nam, va nay
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang x ho. hieu va nam tu ((va thanh) or (va danh)) ki ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x ho. hieu va nam tu ((va thanh) OR (va danh)) ki ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x ho. hieu va nam tu ((va thanh) or (va danh)) ki ((su triet) or (su tien))*.