Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
cac xuc » cam xuc, cac nuoc, cac cuoc
sach ty » sach y, sach tu, xach tay
cao hoc » co hoc, cho hoc, chat hoc
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: te ((sach ty) OR (sach thu)) nang cao hoc. hieu van ((cac xuc) or (chat xuc)) ban hanh vai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang cao hoc. hieu van ((cac xuc) OR (chat xuc)) ban hanh vai cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) nang cao hoc. hieu van ((cac xuc) or (chat xuc)) ban hanh vai cua cau*".