Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
cham truc » cau truc, nham thuc, pham thuc
qua cham » qua hai, qua cac, va cham
te sach » toc sach
lang xa » lang ha, dang xay, lang van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, luat tuc, cua nuoc
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
cua tu » cua su, cua cu, cua te

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. hieu qua cham truc va hanh vi ((((cua tuc) OR (cua tu))) OR (cua thuoc))~.
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu qua cham truc va hanh vi ((((cua tuc) or (cua tu))) or (cua thuoc))*.