Perhaps you should try some spelling variations:
trinh dien » tinh dien, trinh tin
dien cua » dieu cua, dien cuc, dien cu
va trinh » van trinh, va tinh, lap trinh
luat tuc » luat thue
so sanh » do sanh
lam tuc » lam thuoc, lam truoc, nam thuc
co sach » bo sach, cuon sach, hoc sach
tang ho » tang cho, tung ho, tang ha
ho hai » hoc hai, pho hai, cho hai
y tang » ky tang, 6 tang, 7 tang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (co sach)) y tang ho hai. lieu va ((lam tuc) or (luat tuc)) va trinh dien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (co sach)) y tang ho hai. lieu va ((lam tuc) OR (luat tuc)) va trinh dien cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (co sach)) y tang ho hai. lieu va ((lam tuc) or (luat tuc)) va trinh dien cua te*.