Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
pham thuc » phap thuc, pham chuc, nham thuc
dau tien » van tien
thanh va » thanh van, hanh va, thanh ha
thuc dan » thuc hanh, hoc dan, thuc vat
va pham » van pham, va phat, va phap
tu sach » thu sach, su sach, te sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
nang xa » nang x, lang xa, mang xa
va dau » va dao

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 y ((nang xa) or (((nang ma) OR (sang ma)))) hoi. lieu va pham thuc dan thanh va dau tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (((nang ma) OR (sang ma)))) hoi. lieu va pham thuc dan thanh va dau tien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (((nang ma) OR (sang ma)))) hoi. lieu va pham thuc dan thanh va dau tien*".