Perhaps you should try some spelling variations:
nhiem nghe » nghiep nghe, hiem ngheo
nam thuc » nam thuoc, nam thu, nam tu
vat hanh » vat thanh, van hanh, va hanh
su sach » so sach, vu sach
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
lua tre » cua tre, luy tre, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
vi lua » vi luu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu hoach)) ky sang ma hoi. nhiem nghe ((nam thuc) OR (am thuc)) vat hanh vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu hoach)) ky sang ma hoi. nhiem nghe ((nam thuc) OR (am thuc)) vat hanh vi lua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu hoach)) ky sang ma hoi. nhiem nghe ((nam thuc) OR (am thuc)) vat hanh vi lua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu hoach)) ky sang ma hoi. nhiem nghe ((nam thuc) OR (am thuc)) vat hanh vi lua tre*.