Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
xang cao » nang cao, lang cao, quang cao
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, co hoi, cao hoc
qua cam » qua cham, qua cac, qua ca
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty xang cao hoi. hieu qua cam xuc ((van hanh) or (van thanh)) ((di cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang cao hoi. hieu qua cam xuc ((van hanh) OR (van thanh)) ((di cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang cao hoi. hieu qua cam xuc ((van hanh) or (van thanh)) ((di cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang cao hoi. hieu qua cam xuc ((van hanh) or (van thanh)) ((di cua) OR (dai cua)) tre*.