Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh hu » hanh khu, hanh nhu, hanh tu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve phan » va phan, ke phan, ve phat
ve pham » vi pham, v pham, ve phat
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hu cua » tu cua, vu cua
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 ty ((nang xa) or (nang ma)) hoi. hieu ((ve pham) OR (ve phan)) thuc va hanh hu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu ((ve pham) OR (ve phan)) thuc va hanh hu cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (nang ma)) hoi. hieu ((ve pham) OR (ve phan)) thuc va hanh hu cua te*".