Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cham tuc » pham thuc, tham thuc, cham soc
xanh di » danh di, vanh dai, xanh tai
xa xanh » xa thanh, cay xanh, mau xanh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
sach 2 » sach y
ma hoi » mai hoi, xa hoi, ma hoa
2 tang » 2 thang, 6 tang, 7 tang
di cua » dai cua, doi cua, de cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach 2 tang ma hoi. hieu va ((cham tuc) OR (nham thuc)) xa xanh di cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 tang ma hoi. hieu va ((cham tuc) OR (nham thuc)) xa xanh di cua su".
• Adding a wildcard symbol may retrieve word variants: su sach 2 tang ma hoi. hieu va ((cham tuc) OR (nham thuc)) xa xanh di cua su*.