Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu hanh » thuc hanh, thu thanh, thuy hanh
va thanh » gia thanh, ban thanh, va tinh
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
hoi cua » hoi chuc

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 thu hanh xa hoi. ((hieu va) or (lieu va)) cam duc va thanh ((thai cua) or (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu hanh xa hoi. ((hieu va) OR (lieu va)) cam duc va thanh ((thai cua) OR (hoi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thu hanh xa hoi. ((hieu va) or (lieu va)) cam duc va thanh ((thai cua) or (hoi cua)) tre*.