Perhaps you should try some spelling variations:
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cam tuc » cam xuc, nam thuc, dam thuc
va tinh » may tinh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu
da cua » day cua, dan cua, dam cua

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 y nang ma hoi. hieu qua ((cam tuc) or (cam tu)) va tinh ((da cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu qua ((cam tuc) OR (cam tu)) va tinh ((da cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu qua ((cam tuc) or (cam tu)) va tinh ((da cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu qua ((cam tuc) or (cam tu)) va tinh ((da cua) OR (dai cua)) triet*.