Perhaps you should try some spelling variations:
sach thue » sach thu, sach tham, cach thuc
pham thuc » phap thuc, pham chuc, nham thuc
hanh tai » thanh tai, hang tai, han tai
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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 thue) or (sach thieu)) nang ma hoi. hieu ve pham thuc va ((hanh tai) or (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thue) OR (sach thieu)) nang ma hoi. hieu ve pham thuc va ((hanh tai) OR (hanh vi)) cua te.
• Adding a wildcard symbol may retrieve word variants: so ((sach thue) or (sach thieu)) nang ma hoi. hieu ve pham thuc va ((hanh tai) or (hanh vi)) cua te*.