Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
hieu viec » nhieu viec, hieu ve, hieu hien
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cac xuc » cam xuc, cac nuoc, chat xuc
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
di cua » dai cua, doi cua, de cua
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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