Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
quy trinh » qua trinh, quy dinh
cua viet » ca viet, hoa viet, cua vat
thu sach » thuat sach, thuoc sach, thu hoach
van cua » vang cua, ban cua, dan cua
hieu ve » hieu va, hieu van
tu sach » su sach, te sach, tu cach
hieu he » hiem he, hieu le, hieu hien
ty nang » ky nang, ty xang, ty hang
nam tu » nam thu, nam thuc
tu quy » tu duy, tu quynh
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ty nang x hoi. ((hieu he) OR (hieu ve)) nam tu quy trinh van cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. ((hieu he) OR (hieu ve)) nam tu quy trinh van cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang x hoi. ((hieu he) OR (hieu ve)) nam tu quy trinh van cua viet*".