Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
luu truc » luu tru, cau truc, cuu thuc
thanh vi » hanh vi, thanh va, thanh ve
nam thuc » nam thuoc, am thuc, nam thu
hiem he » hiem xe, thien he, hiem cho
tu sach » thu sach, su sach, te sach
hieu he » hieu ve, hieu le, hieu hien
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
vi luu » vi lua

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 hoach)) ky nang ma hoi. ((hieu he) OR (hiem he)) nam thuc vat thanh vi luu truc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang ma hoi. ((hieu he) OR (hiem he)) nam thuc vat thanh vi luu truc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ky nang ma hoi. ((hieu he) OR (hiem he)) nam thuc vat thanh vi luu truc*".