Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
van thanh » ban thanh, van tuan
chat huu » pham huu
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » ban hanh, van anh, van ban
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ve chat » va chat, van chat
ma hoi » mai hoi, xa hoi, ma hoa
vi cau » va cau, ve cau, di cau

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)) ky nang ma hoi. hieu ve chat huu ((van hanh) or (van thanh)) vi cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu ve chat huu ((van hanh) OR (van thanh)) vi cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang ma hoi. hieu ve chat huu ((van hanh) or (van thanh)) vi cau triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu ve chat huu ((van hanh) or (van thanh)) vi cau triet*.