Perhaps you should try some spelling variations:
quan thanh » ban thanh, van thanh
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
su sach » so sach
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, nang cao
cam qua » cau qua, cac qua, cay qua
cua tre » cua te, cuu tre, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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 (vu sach)) ky nang ma hoi. lieu va cam qua quan thanh vai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang ma hoi. lieu va cam qua quan thanh vai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang ma hoi. lieu va cam qua quan thanh vai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang ma hoi. lieu va cam qua quan thanh vai ((cua tre) OR (cua triet))*.