Perhaps you should try some spelling variations:
cua quoc » cua nuoc, cua thuoc
thu sach » thuat sach, thuoc sach, thu hoach
quan vi » quan li, quan tri, quan doi
tuan vi » luan vi, quans vi, tuan tai
xuc van » duc van, luc van, vuc van
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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)) y nang ma hoi. hieu ve cam xuc van ((tuan vi) OR (quan vi)) cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ma hoi. hieu ve cam xuc van ((tuan vi) OR (quan vi)) cua quoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y nang ma hoi. hieu ve cam xuc van ((tuan vi) OR (quan vi)) cua quoc".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang ma hoi. hieu ve cam xuc van ((tuan vi) OR (quan vi)) cua quoc*.