Perhaps you should try some spelling variations:
doc thuc » hoc thuc, do thuc, hoc thuoc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve doc » ve duoc, va doc, me doc
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang x hoi. hieu ve doc thuc va thanh vi ((cau treo) or (cau thi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu ve doc thuc va thanh vi ((cau treo) OR (cau thi)).
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu ve doc thuc va thanh vi ((cau treo) or (cau thi))*.