Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nam truc » nam truoc, nam thuc, nam trung
cam truc » cau truc, lam truoc, nam truoc
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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