Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu van » hieu va, thien van, lieu va
ly nang » ky nang, ly hang, ly vang
van lam » van nam
lam cua » nam cua, lam chat
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
nang o » nang co, nang ho, nang ro
cua tu » cua tuc, cua su, cua cu
o hai » co hai, so hai, o lai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (nuoc sach)) ly nang o hai. hieu van lam cua ban ((hanh di) or (hanh de)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ly nang o hai. hieu van lam cua ban ((hanh di) OR (hanh de)) cua tu.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (nuoc sach)) ly nang o hai. hieu van lam cua ban ((hanh di) or (hanh de)) cua tu*.