Perhaps you should try some spelling variations:
sach tham » sach nha
cach thuc » anh thuc, cac thu
hieu van » hieu va, thien van, lieu va
thang ma » thang mua, tang ma, thang va
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
luy tre » luyen tre
van cau » van dau, van hau, van chat
ma hoi » mai hoi, xa hoi, ma hoa
vi luy » vi lua, vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((cach thuc) or (sach tham)) thang ma hoi. hieu van cau ((truc va) or (thuc va)) hanh vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((cach thuc) OR (sach tham)) thang ma hoi. hieu van cau ((truc va) OR (thuc va)) hanh vi luy tre.
• Adding a wildcard symbol may retrieve word variants: te ((cach thuc) or (sach tham)) thang ma hoi. hieu van cau ((truc va) or (thuc va)) hanh vi luy tre*.