Perhaps you should try some spelling variations:
trinh doc » trinh do, trinh hoa, trinh co
luat tuc » luat thue
tinh doi » trinh do, tinh hoc, tinh son
hieu cua » hieu qua, dieu cua, bieu cua
cua luat » quy luat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((ma hoi) OR (ma hoa)). hieu cua luat tuc va ((tinh doi) or (trinh doc)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (ma hoa)). hieu cua luat tuc va ((tinh doi) OR (trinh doc)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) OR (ma hoa)). hieu cua luat tuc va ((tinh doi) or (trinh doc)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) OR (ma hoa)). hieu cua luat tuc va ((tinh doi) or (trinh doc)) cuu tre*.