Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi hang » thi hanh, thi nang, thi hong
hang cau » hang dau, hang ca, nhung cau
va trien » va truyen, va thiet, va tuyen
hanh dao » lanh dao, thanh dat, thanh dam
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
ca chat » cac chat, va chat, ca cham
su viet » so viet

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 thi hang cau hoi. hieu ((ca chat) or (cao chat)) thuc va hanh dao ((va trien) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hang cau hoi. hieu ((ca chat) OR (cao chat)) thuc va hanh dao ((va trien) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thi hang cau hoi. hieu ((ca chat) or (cao chat)) thuc va hanh dao ((va trien) or (su viet))*.