Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
cau loc » cau hoc, cau luc, cau long
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
hau loc » huu loc, phau hoc
va va » va van, va vua, va vai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu qua ((cau loc) OR (hau loc)) ((va hanh) OR (va thanh)) va va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang xa hoi. hieu qua ((cau loc) or (hau loc)) ((va hanh) OR (va thanh)) va va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu qua ((cau loc) or (hau loc)) ((va hanh) OR (va thanh)) va va triet*.