Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoc » co hoc, cho hoc, chat hoc
dan cac » dan cach, dang cac, dan ca
van hac » van hoc, van ha, van hai
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
cua cau » cua cac, cua chu, cua cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang cao hoc. hieu ((dan cac) or (van hac)) ((xuc van) or (duc van)) hanh lai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cao hoc. hieu ((dan cac) OR (van hac)) ((xuc van) OR (duc van)) hanh lai cua cau*.