Perhaps you should try some spelling variations:
cach thue » cach thuc, sach thue, cach thien
cua triet » cua viet, su triet, va triet
qua cach » qua cac, quan sach, quat canh
thue gia » phu gia
thanh vi » hanh vi, thanh va, thanh ve
dua tren » dung tren
bo sach » co sach, hoc sach
cua tre » cua te, cuu tre, cua thep
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: bo sach v nang x hoi. hieu qua cach thue gia thanh vi ((((cua tre) or (dua tren))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach v nang x hoi. hieu qua cach thue gia thanh vi ((((cua tre) OR (dua tren))) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: bo sach v nang x hoi. hieu qua cach thue gia thanh vi ((((cua tre) or (dua tren))) or (cua triet))*.