Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cam » viec lam, viec cua, viec va
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
vai cua » hai cua, lai cua, bai cua
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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