Perhaps you should try some spelling variations:
cham truc » nham thuc, pham thuc, nam truc
cac tieu » cach tieu, cac trieu, cac kieu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. hieu qua ((cham truc) OR (cau truc)) va hanh va cac tieu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu qua ((cham truc) OR (cau truc)) va hanh va cac tieu".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu qua ((cham truc) OR (cau truc)) va hanh va cac tieu*.