Perhaps you should try some spelling variations:
sua triet » su triet, cua triet, sua tiet
thien van » thi van
lanh dai » lanh dao, lanh hai, lang dai
hieu van » hieu va, lieu va, hieu ve
thu sach » thuat sach, thuoc sach, thu hoach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
va lanh » va lang, va danh, va hanh
dai sua » dai cua
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ty nang ma hoi. ((hieu van) or (thien van)) cam xuc va lanh dai sua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang ma hoi. ((hieu van) OR (thien van)) cam xuc va lanh dai sua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang ma hoi. ((hieu van) or (thien van)) cam xuc va lanh dai sua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang ma hoi. ((hieu van) or (thien van)) cam xuc va lanh dai sua triet*.