Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su tien
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
ban dan » ban hang, ban hanh, ban quan
nang ma » tang ma, sang ma, nang cao
su viet » so viet
ca dua » cay dua, ca cua, ca da
y nang » ky nang, ly nang, v nang
dan vi » doan vi, don vi, dan va
ma hoi » mai hoi, xa hoi, ma hoa
va ca » va cac, va cao, va cai

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. lieu va ca dua ban dan vi ((((su triet) OR (ve triet))) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. lieu va ca dua ban dan vi ((((su triet) OR (ve triet))) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. lieu va ca dua ban dan vi ((((su triet) OR (ve triet))) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. lieu va ca dua ban dan vi ((((su triet) OR (ve triet))) or (su viet))*.