Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
chuc van » chu van, chuc va, thuc van
chuc vat » thuc vat, chuc va, chuc hoat
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
ma hoi » mai hoi, xa hoi, ma hoa
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: so sach ((thu nang) or (thu hang)) ma hoi. hieu va pham ((chuc vat) OR (chuc van)) thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (thu hang)) ma hoi. hieu va pham ((chuc vat) OR (chuc van)) thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thu nang) or (thu hang)) ma hoi. hieu va pham ((chuc vat) OR (chuc van)) thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((thu nang) or (thu hang)) ma hoi. hieu va pham ((chuc vat) OR (chuc van)) thanh vai cua te*.