Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh lai » hanh lam, hanh tai, thanh lap
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
hieu va » lieu va, hieu qua
van hoc » van hoa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau

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) or (thuat sach)) ky tang van hoc. hieu va cau ((xuc van) OR (vuc van)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky tang van hoc. hieu va cau ((xuc van) OR (vuc van)) hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) ky tang van hoc. hieu va cau ((xuc van) OR (vuc van)) hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky tang van hoc. hieu va cau ((xuc van) OR (vuc van)) hanh lai cua tre*.