Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh mot » thanh moi, hanh mot, thanh hoa
tu sach » thu sach, su sach, te sach
ve pham » vi pham, v pham, ve phan
mot cua » mat cua, mot nua, mot chut
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
cua te » cua tu

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