Perhaps you should try some spelling variations:
sach tham » sach nha
thuc dan » thuc hanh, hoc dan, thuc vat
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
sang ma » tang ma, nang ma, sang tao
thuc va » thuc vat, thuc day
v phap » va phap, ve phap, v pham
hieu v » hieu va, hieu ve, hieu 2
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: so ((sach thieu) or (sach tham)) sang ma hoi. hieu v phap ((thuc va) or (thuc dan)) hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thieu) OR (sach tham)) sang ma hoi. hieu v phap ((thuc va) OR (thuc dan)) hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: so ((sach thieu) or (sach tham)) sang ma hoi. hieu v phap ((thuc va) or (thuc dan)) hanh vai cua tu*.