Perhaps you should try some spelling variations:
va trinh » van trinh, va tinh, lap trinh
trinh di » trinh do, trinh dien, trinh dinh
so sach » so sanh, bo sach, co sach
nang ho » nang hoc, nang co, nang cao
tang ho » tang cho, tung ho, tang ha
lam tuc » lam thuoc, lam truoc, luat tuc
di cua » dai cua, doi cua, de cua
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 sach y ((nang ho) OR (tang ho)) hai. lieu va ((lam tuc) or (luat thue)) va trinh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang ho) OR (tang ho)) hai. lieu va ((lam tuc) OR (luat thue)) va trinh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang ho) OR (tang ho)) hai. lieu va ((lam tuc) or (luat thue)) va trinh di cua te".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ho) OR (tang ho)) hai. lieu va ((lam tuc) or (luat thue)) va trinh di cua te*.