Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va thanh » gia thanh, ban thanh, va tinh
cau luc » cau truc, cau phuc
vai cua » dai cua, hai cua, lai cua
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
ve cau » ke cau, va cau, ve cac
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: ((toc sach) or (doc sach)) ky ((nang ma) or (sang ma)) hoi. hieu ve cau luc va thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cau luc va thanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky ((nang ma) or (sang ma)) hoi. hieu ve cau luc va thanh vai cua te*.