Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nang tai » tang tai, sang tai, nang cao
hang tai » hang va, dung tai
van hang » van khang, van hoang, van thang
xuc van » duc van, luc van, vuc van
tai hoi » tai khoi, dai hoi, tai hai
va cao » va cac, va co, va dao
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cai
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang tai hoi. lieu ((va cam) OR (va cao)) xuc van hang tai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang tai hoi. lieu ((va cam) OR (va cao)) xuc van hang tai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang tai hoi. lieu ((va cam) OR (va cao)) xuc van hang tai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang tai hoi. lieu ((va cam) OR (va cao)) xuc van hang tai ((cua te) or (cua tu))*.