Perhaps you should try some spelling variations:
trinh doi » trinh do, trinh hoi, tinh doi
luat tuc » luat thue
nang noi » nang doc
va trinh » van trinh, va tinh, lap trinh
so sach » so sanh, bo sach, co sach
nang co » nang cao, nang doc, nang hoc
doi cua » dai cua, hoi cua
sach ly » sach y, sach lo, sach ty
lam tuc » lam thuoc, lam truoc, nam thuc
cua tu » cua tuc, cua su, cua cu

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 ly ((nang co) OR (nang noi)) hai. lieu va ((lam tuc) or (luat tuc)) va trinh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly ((nang co) OR (nang noi)) hai. lieu va ((lam tuc) OR (luat tuc)) va trinh doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly ((nang co) OR (nang noi)) hai. lieu va ((lam tuc) or (luat tuc)) va trinh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: so sach ly ((nang co) OR (nang noi)) hai. lieu va ((lam tuc) or (luat tuc)) va trinh doi cua tu*.