Perhaps you should try some spelling variations:
sach tham » sach nha
sach thue » sach thu, sach thieu, cach thuc
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
van hoc » van hoa
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
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: te ((sach thue) OR (sach tham)) nang ma hoi. hieu van hoc ((duc va) or (duc tan)) hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thue) OR (sach tham)) nang ma hoi. hieu van hoc ((duc va) OR (duc tan)) hanh vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thue) OR (sach tham)) nang ma hoi. hieu van hoc ((duc va) or (duc tan)) hanh vai cua tu*".